Iodide

Formula: I^-
Molecular weight: 126.90502
IUPAC Standard InChI: InChI=1S/HI/h1H/p-1
IUPAC Standard InChIKey: XMBWDFGMSWQBCA-UHFFFAOYSA-M
CAS Registry Number: 20461-54-5
Chemical structure:
This structure is also available as a 2d Mol file
Other names: Iodized Oil; Iodine anion
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Information on this page:
Other data available:
- Gas phase thermochemistry data
- Reaction thermochemistry data: reactions 51 to 100, reactions 101 to 150
- Gas phase ion energetics data
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Reaction thermochemistry data

Go To: Top, Ion clustering data, References, Notes

Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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Reactions 1 to 50

Iodide + = ( Iodide • )

By formula: I^- + H₂O = (I^- • H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.4 ± 0.7	kcal/mol	AVG	N/A	Average of 6 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	15.3	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	19.3	cal/mol*K	HPMS	Keesee and Castleman, 1980	gas phase; M
Δ_rS°	16.3	cal/mol*K	HPMS	Arshadi, Yamdagni, et al., 1970	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	5.5 ± 0.3	kcal/mol	AVG	N/A	Average of 6 values; Individual data points

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
5.3	300.	HPMS	Banic and Iribarne, 1985	gas phase; electric fields; M

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • H₂O) + H₂O = (I^- • 2H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.90 ± 0.20	kcal/mol	TDAs	Keesee and Castleman, 1980	gas phase; B,M
Δ_rH°	9.50	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B
Δ_rH°	9.50 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	9.8 ± 1.0	kcal/mol	TDAs	Payzant, Yamdagni, et al., 1971	gas phase; B
Δ_rH°	9.8 ± 1.0	kcal/mol	TDAs	Arshadi, Yamdagni, et al., 1970	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.6	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	20.3	cal/mol*K	HPMS	Keesee and Castleman, 1980	gas phase; M
Δ_rS°	19.0	cal/mol*K	HPMS	Arshadi, Yamdagni, et al., 1970	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.0 ± 0.5	kcal/mol	AVG	N/A	Average of 6 values; Individual data points

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
4.1	300.	HPMS	Banic and Iribarne, 1985	gas phase; electric fields; M

Iodide + = ( Iodide • )

By formula: I^- + CO₂ = (I^- • CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.7 ± 1.8	kcal/mol	N/A	Piani, Becucci, et al., 2008	gas phase; Stated electron affinity is the Vertical Detachment Energy; B
Δ_rH°	4.0 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.7 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B,M
Δ_rH°	3.20	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	5.60 ± 0.10	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	13.4	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; M
Δ_rS°	18.2	cal/mol*K	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.7 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B
Δ_rG°	0.80 ± 0.10	kcal/mol	TDAs	Banic and Iribarne, 1985	gas phase; B,M
Δ_rG°	0.40 ± 0.10	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2H₂O) + H₂O = (I^- • 3H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.30 ± 0.30	kcal/mol	TDAs	Keesee and Castleman, 1980	gas phase; B,M
Δ_rH°	8.5 ± 2.3	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B
Δ_rH°	9.20 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	9.4 ± 1.0	kcal/mol	TDAs	Payzant, Yamdagni, et al., 1971	gas phase; B
Δ_rH°	9.4 ± 1.0	kcal/mol	TDAs	Arshadi, Yamdagni, et al., 1970	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.4	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	21.0	cal/mol*K	HPMS	Keesee and Castleman, 1980	gas phase; M
Δ_rS°	21.3	cal/mol*K	HPMS	Arshadi, Yamdagni, et al., 1970	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.00	kcal/mol	TDAs	Keesee and Castleman, 1980	gas phase; B
Δ_rG°	3.10 ± 0.80	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B
Δ_rG°	3.3 ± 2.0	kcal/mol	TDAs	Kebarle, Arshadi, et al., 1968	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + C₂H₃N = (I^- • C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.9 ± 2.0	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B,M
Δ_rH°	11.10 ± 0.40	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Δ_rH°	11.1 ± 1.1	kcal/mol	LPES	Dessent, Bailey, et al., 1995	gas phase; B
Δ_rH°	11.00 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	12.	kcal/mol	PHPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	13.8	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	18.2	cal/mol*K	PHPMS	Yamdagni and Kebarle, 1972	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	6.4 ± 2.0	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B
Δ_rG°	6.6 ± 2.0	kcal/mol	IMRE	Tanabe, Morgon, et al., 1996	gas phase; Anchored to H2O..I- of Caldwell and Kebarle, 1984; B
Δ_rG°	6.90 ± 0.50	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + CH₄O = (I^- • CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.90 ± 0.20	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	11.3 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Δ_rH°	11.2	kcal/mol	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Δ_rH°	11.	kcal/mol	PHPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.1	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Δ_rS°	17.8	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	5.76	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	6.0 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B
Δ_rG°	5.7 ± 2.0	kcal/mol	IMRE	Tanabe, Morgon, et al., 1996	gas phase; Anchored to H2O..I- of Caldwell and Kebarle, 1984; B

Iodide + = ( Iodide • )

By formula: I^- + CH₃I = (I^- • CH₃I)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.53 ± 0.20	kcal/mol	N/A	Van Duzor, Wei, et al., 2010	gas phase; B
Δ_rH°	7.80 ± 0.20	kcal/mol	TDAs	Hiraoka, Fujita, et al., 1905	gas phase; B
Δ_rH°	8.40 ± 0.50	kcal/mol	N/A	Arnold, Neumark, et al., 1995	gas phase; ZEKE data, shift relative to bare I-; B
Δ_rH°	8.30 ± 0.50	kcal/mol	PDis	Cyr, Bishea, et al., 1992	gas phase; B
Δ_rH°	9.0 ± 2.0	kcal/mol	TDAs	Dougherty and Roberts, 1974	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	16.4	cal/mol*K	HPMS	Dougherty and Roberts, 1974	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.73 ± 0.20	kcal/mol	TDAs	Hiraoka, Fujita, et al., 1905	gas phase; B
Δ_rG°	4.10 ± 0.30	kcal/mol	TDAs	Dougherty and Roberts, 1974	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • C₂H₃N) + C₂H₃N = (I^- • 2C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.40 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	11.10 ± 0.70	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Δ_rH°	11.10 ± 0.40	kcal/mol	N/A	Dessent, Bailey, et al., 1995	gas phase; Vertical Detachment Energy: 2.25±0.08 eV.; B
Δ_rH°	10.50	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.4	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	20.8	cal/mol*K	PHPMS	Yamdagni and Kebarle, 1972	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.90 ± 0.80	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B
Δ_rG°	4.30	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + O₂S = (I^- • O₂S)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14.3 ± 2.0	kcal/mol	TDAs	Caldwell and Kebarle, 1985	gas phase; B,M
Δ_rH°	12.90 ± 0.10	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.6	cal/mol*K	PHPMS	Caldwell and Kebarle, 1985	gas phase; M
Δ_rS°	20.2	cal/mol*K	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	9.0 ± 2.6	kcal/mol	TDAs	Caldwell and Kebarle, 1985	gas phase; B
Δ_rG°	1.70 ± 0.10	kcal/mol	TDAs	Banic and Iribarne, 1985	gas phase; B
Δ_rG°	6.80 ± 0.20	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
9.0	301.	HPMS	Banic and Iribarne, 1985	gas phase; electric fields; M

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2CO₂) + CO₂ = (I^- • 3CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.20	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	3.7 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.6 ± 1.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.4	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-0.6 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B

( Iodide • 4) + = ( Iodide • 5)

By formula: (I^- • 4CO₂) + CO₂ = (I^- • 5CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.70	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	3.1 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.3 ± 1.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.0	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-1.4 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • CO₂) + CO₂ = (I^- • 2CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.6 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.7 ± 1.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B,M
Δ_rH°	2.60	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.3	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.7 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B

( Iodide • 3) + = ( Iodide • 4)

By formula: (I^- • 3H₂O) + H₂O = (I^- • 4H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.20 ± 0.40	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	6.9 ± 2.3	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	23.6	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.1 ± 1.6	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B
Δ_rG°	2.2 ± 2.0	kcal/mol	TDAs	Kebarle, Arshadi, et al., 1968	gas phase; B,M

( Iodide • 5) + = ( Iodide • 6)

By formula: (I^- • 5CO₂) + CO₂ = (I^- • 6CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.0 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	1.80	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	4.2	kcal/mol	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.	cal/mol*K	N/A	Hiraoka, Mizuse, et al., 1987	gas phase; Entropy change calculated or estimated; M

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2C₂H₃N) + C₂H₃N = (I^- • 3C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.20 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	9.70 ± 0.70	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Δ_rH°	9.30	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.9	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	22.1	cal/mol*K	PHPMS	Yamdagni and Kebarle, 1972	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.20 ± 0.80	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B
Δ_rG°	2.70	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B

( Iodide • 4) + = ( Iodide • 5)

By formula: (I^- • 4H₂O) + H₂O = (I^- • 5H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.00	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; Entropy estimated; B,M
Δ_rH°	4.20	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	25.	cal/mol*K	N/A	Hiraoka, Mizuse, et al., 1988	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.50	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; Entropy estimated; B

Iodide + = ( Iodide • )

By formula: I^- + C₂H₆O = (I^- • C₂H₆O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.00 ± 0.20	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	12.1 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.9	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	6.11	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	6.4 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B
Δ_rG°	6.0 ± 2.0	kcal/mol	IMRE	Tanabe, Morgon, et al., 1996	gas phase; Anchored to H2O..I- of Caldwell and Kebarle, 1984; B

( Iodide • 3) + = ( Iodide • 4)

By formula: (I^- • 3CO₂) + CO₂ = (I^- • 4CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.80	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	3.6 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.5 ± 1.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-1.0 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B

Iodide + = I₃^-

By formula: I^- + I₂ = I₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	32.5 ± 2.4	kcal/mol	N/A	Taylor, Asmis, et al., 1999	gas phase; B
Δ_rH°	30.1 ± 1.4	kcal/mol	CIDT	Do, Klein, et al., 1997	gas phase; B
Δ_rH°	85.10	kcal/mol	Ther	Finch, Gates, et al., 1977	gas phase; This value is far more bound than expected from other studies; B
Δ_rH°	32.60	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeF3-(t); ; ΔS(EA)=2.8; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	22.50	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeF3-(t); ; ΔS(EA)=2.8; B

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅ClO = (I^- • C₆H₅ClO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	20.5 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	11.6 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
11.6	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅ClO = (I^- • C₆H₅ClO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	21.1 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	12.2 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
12.2	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅FO = (I^- • C₆H₅FO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.6 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.7 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
10.5	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅FO = (I^- • C₆H₅FO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.4 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.5 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
10.7	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅NO₃ = (I^- • C₆H₅NO₃)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	23.2 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	14.3 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
14.3	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₇H₅NO = (I^- • C₇H₅NO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	23.8 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	14.9 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
14.9	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₇H₅NO = (I^- • C₇H₅NO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	23.0 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	14.1 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
14.1	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₇H₈O = (I^- • C₇H₈O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.4 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	7.5 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
7.5	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₆O = (I^- • C₆H₆O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17.3 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	8.4 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
8.4	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + HBr = (I^- • HBr)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.1 ± 2.0	kcal/mol	TDEq	Caldwell and Kebarle, 1985	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.6	cal/mol*K	PHPMS	Caldwell and Kebarle, 1985	gas phase; switching reaction(I-)SO2; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.2 ± 2.6	kcal/mol	TDEq	Caldwell and Kebarle, 1985	gas phase; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
10.2	300.	PHPMS	Caldwell and Kebarle, 1985	gas phase; switching reaction(I-)SO2; M

Iodide + = ( Iodide • )

By formula: I^- + HI = (I^- • HI)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17.0 ± 2.0	kcal/mol	TDEq	Caldwell and Kebarle, 1985	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	24.4	cal/mol*K	PHPMS	Caldwell and Kebarle, 1985	gas phase; switching reaction(I-)SO2; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	9.7 ± 2.6	kcal/mol	TDEq	Caldwell and Kebarle, 1985	gas phase; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
9.7	300.	PHPMS	Caldwell and Kebarle, 1985	gas phase; switching reaction(I-)SO2; M

Iodide + =

By formula: I^- + H⁺ = HI

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	314.350 ± 0.020	kcal/mol	D-EA	Pelaez, Blondel, et al., 2009	gas phase; Given: 3.0590463(38) eV; B
Δ_rH°	313.60	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; Fe(CO)2-(q); ; ΔS(EA)=5.0; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	309.280 ± 0.060	kcal/mol	H-TS	Pelaez, Blondel, et al., 2009	gas phase; Given: 3.0590463(38) eV; B
Δ_rG°	308.50	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; Fe(CO)2-(q); ; ΔS(EA)=5.0; B

Iodide + = ( Iodide • )

By formula: I^- + HCl = (I^- • HCl)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14.8 ± 2.0	kcal/mol	TDAs	Caldwell and Kebarle, 1985	gas phase; B,M
Δ_rH°	14.2	kcal/mol	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.0	cal/mol*K	PHPMS	Caldwell and Kebarle, 1985	gas phase; M
Δ_rS°	22.7	cal/mol*K	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	8.8 ± 2.6	kcal/mol	TDAs	Caldwell and Kebarle, 1985	gas phase; B

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2N₂O) + N₂O = (I^- • 3N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.7 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	3.2	kcal/mol	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	15.	cal/mol*K	N/A	Hiraoka, Aruga, et al., 1993	gas phase; Entropy change calculated or estimated; M

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2CH₄O) + CH₄O = (I^- • 3CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.70 ± 0.60	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	9.8 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	22.4	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.41	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	3.1 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • CH₄O) + CH₄O = (I^- • 2CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.50 ± 0.20	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	11.1 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	22.6	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.25	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	4.4 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + CH₂O₂ = (I^- • CH₂O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18.9 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Δ_rH°	12.9 ± 2.1	kcal/mol	CIDT	Walker and Sunderlin, 1999	gas phase; Authors suggest real value somewhere between this and Caldwell and Kebarle, 1984; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.7	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	12.7 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₃H₈O = (I^- • C₃H₈O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.10 ± 0.20	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	12.2 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.1	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	6.33	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	6.5 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₄H₁₀O = (I^- • C₄H₁₀O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.10 ± 0.30	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	12.1 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.7	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	6.15	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	6.5 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + H₃N = (I^- • H₃N)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.40 ± 0.30	kcal/mol	TDAs	Evans, Keesee, et al., 1987	gas phase; B,M
Δ_rH°	7.4 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.9	cal/mol*K	HPMS	Evans, Keesee, et al., 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.20 ± 0.60	kcal/mol	TDAs	Evans, Keesee, et al., 1987	gas phase; B

( Iodide • 6) + = ( Iodide • 7)

By formula: (I^- • 6CO₂) + CO₂ = (I^- • 7CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.3 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	1.90	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B

( Iodide • 7) + = ( Iodide • 8)

By formula: (I^- • 7CO₂) + CO₂ = (I^- • 8CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.1 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	1.90	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • N₂O) + N₂O = (I^- • 2N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.9 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	3.3 ± 0.3	kcal/mol	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	14.2	cal/mol*K	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; M

( Iodide • 7) + = ( Iodide • 8)

By formula: (I^- • 7CH₄O) + CH₄O = (I^- • 8CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.1 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; Entropy estimated.; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	28.	cal/mol*K	N/A	Hiraoka and Yamabe, 1991	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.8 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; Entropy estimated.; B

( Iodide • 3) + = ( Iodide • 4)

By formula: (I^- • 3C₂H₃N) + C₂H₃N = (I^- • 4C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.80 ± 0.10	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	7.40 ± 0.80	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.3	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.00 ± 0.40	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B

( Iodide • 4) + = ( Iodide • 5)

By formula: (I^- • 4C₂H₃N) + C₂H₃N = (I^- • 5C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.10 ± 0.30	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	10.60 ± 0.90	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.9	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.4 ± 1.4	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + N₂O = (I^- • N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.7 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	3.8 ± 0.3	kcal/mol	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	14.1	cal/mol*K	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₆ = (I^- • C₆H₆)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.1 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988, 2	gas phase; B,M
Δ_rH°	9.1 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	14.2	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.8 ± 2.6	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988, 2	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₂H₆OS = (I^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	15.70	kcal/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B,M
Δ_rH°	16.	kcal/mol	PHPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.7	cal/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	9.20	kcal/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B

Iodide = BrI₂^-

By formula: I^- = BrI₂^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	33.88 ± 0.23	kcal/mol	PDis	Crider, Harrison, et al., 2011	gas phase; B
Δ_rH°	35.70	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeF2-(q); ; ΔS(EA)=4.5; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	25.80	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeF2-(q); ; ΔS(EA)=4.5; B

Iodide + = IXe^-

By formula: I^- + Xe = IXe^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.60	kcal/mol	N/A	Lenzer, Furlanetto, et al., 1998	gas phase; B
Δ_rH°	2.80	kcal/mol	TDAs	Wada, Kikkawa, et al., 2007	gas phase; Entropy estimated; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-1.97	kcal/mol	TDAs	Wada, Kikkawa, et al., 2007	gas phase; Entropy estimated; B

Ion clustering data

Go To: Top, Reaction thermochemistry data, References, Notes

Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

Iodide = BrI₂^-

By formula: I^- = BrI₂^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	33.88 ± 0.23	kcal/mol	PDis	Crider, Harrison, et al., 2011	gas phase; B
Δ_rH°	35.70	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeF2-(q); ; ΔS(EA)=4.5; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	25.80	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeF2-(q); ; ΔS(EA)=4.5; B

Iodide = CH₃ClI^-

By formula: I^- = CH₃ClI^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.07 ± 0.23	kcal/mol	N/A	Van Duzor, Wei, et al., 2010	gas phase; B

Iodide = C₆H₅INO₂^-

By formula: I^- = C₆H₅INO₂^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.1 ± 2.0	kcal/mol	N/A	Piani, Becucci, et al., 2008	gas phase; Stated electron affinity is the Vertical Detachment Energy; B

Iodide = HIS^-

By formula: I^- = HIS^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18.20	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; H-; ; ΔS(acid)=20.9; ΔS(EA)=6.4; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	13.40	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; H-; ; ΔS(acid)=20.9; ΔS(EA)=6.4; B

Iodide = IRb^-

By formula: I^- = IRb^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	22.7 ± 1.0	kcal/mol	Ther	Miller, Leopold, et al., 1986	gas phase; Extrapolated by polarizability and radius from experimental data.; B

Iodide + = ( Iodide • )

By formula: I^- + Ar = (I^- • Ar)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	0.60	kcal/mol	Ther	Zhao, Yourshaw, et al., 1994	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + CHCl₃ = (I^- • CHCl₃)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14.1 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + CHF₃ = (I^- • CHF₃)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.9 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + CHN = (I^- • CHN)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.8 ± 1.0	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.2	cal/mol*K	PHPMS	Meot-ner, Cybulski, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.4 ± 1.6	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • CHN) + CHN = (I^- • 2CHN)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.2 ± 1.0	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.0	cal/mol*K	PHPMS	Meot-ner, Cybulski, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	7.20	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2CHN) + CHN = (I^- • 3CHN)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.2 ± 1.0	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.0	cal/mol*K	PHPMS	Meot-ner, Cybulski, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.90	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B

( Iodide • 3) + = ( Iodide • 4)

By formula: (I^- • 3CHN) + CHN = (I^- • 4CHN)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.2 ± 1.0	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.3	cal/mol*K	PHPMS	Meot-ner, Cybulski, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.20	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B

( Iodide • 4) + = ( Iodide • 5)

By formula: (I^- • 4CHN) + CHN = (I^- • 5CHN)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.6 ± 1.0	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	22.9	cal/mol*K	PHPMS	Meot-ner, Cybulski, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.80	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B

( Iodide • 5) + = ( Iodide • 6)

By formula: (I^- • 5CHN) + CHN = (I^- • 6CHN)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.4 ± 1.0	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.9	cal/mol*K	PHPMS	Meot-ner, Cybulski, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.50	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B

( Iodide • 6) + = ( Iodide • 7)

By formula: (I^- • 6CHN) + CHN = (I^- • 7CHN)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.4 ± 1.0	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.9	cal/mol*K	PHPMS	Meot-ner, Cybulski, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.50	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B

( Iodide • 7) + = ( Iodide • 8)

By formula: (I^- • 7CHN) + CHN = (I^- • 8CHN)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.8 ± 1.0	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.2	cal/mol*K	PHPMS	Meot-ner, Cybulski, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.50	kcal/mol	TDAs	Meot-ner, Cybulski, et al., 1988	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + CH₂O₂ = (I^- • CH₂O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18.9 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Δ_rH°	12.9 ± 2.1	kcal/mol	CIDT	Walker and Sunderlin, 1999	gas phase; Authors suggest real value somewhere between this and Caldwell and Kebarle, 1984; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.7	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	12.7 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + CH₃Br = (I^- • CH₃Br)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.30 ± 0.20	kcal/mol	N/A	Van Duzor, Wei, et al., 2010	gas phase; B
Δ_rH°	8.30 ± 0.50	kcal/mol	PDis	Cyr, Bishea, et al., 1992	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + CH₃I = (I^- • CH₃I)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.53 ± 0.20	kcal/mol	N/A	Van Duzor, Wei, et al., 2010	gas phase; B
Δ_rH°	7.80 ± 0.20	kcal/mol	TDAs	Hiraoka, Fujita, et al., 1905	gas phase; B
Δ_rH°	8.40 ± 0.50	kcal/mol	N/A	Arnold, Neumark, et al., 1995	gas phase; ZEKE data, shift relative to bare I-; B
Δ_rH°	8.30 ± 0.50	kcal/mol	PDis	Cyr, Bishea, et al., 1992	gas phase; B
Δ_rH°	9.0 ± 2.0	kcal/mol	TDAs	Dougherty and Roberts, 1974	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	16.4	cal/mol*K	HPMS	Dougherty and Roberts, 1974	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.73 ± 0.20	kcal/mol	TDAs	Hiraoka, Fujita, et al., 1905	gas phase; B
Δ_rG°	4.10 ± 0.30	kcal/mol	TDAs	Dougherty and Roberts, 1974	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + CH₃NO₂ = (I^- • CH₃NO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.2 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + CH₄O = (I^- • CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.90 ± 0.20	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	11.3 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Δ_rH°	11.2	kcal/mol	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Δ_rH°	11.	kcal/mol	PHPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.1	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Δ_rS°	17.8	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	5.76	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	6.0 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B
Δ_rG°	5.7 ± 2.0	kcal/mol	IMRE	Tanabe, Morgon, et al., 1996	gas phase; Anchored to H2O..I- of Caldwell and Kebarle, 1984; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • CH₄O) + CH₄O = (I^- • 2CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.50 ± 0.20	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	11.1 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	22.6	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.25	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	4.4 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2CH₄O) + CH₄O = (I^- • 3CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.70 ± 0.60	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	9.8 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	22.4	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.41	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	3.1 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B

( Iodide • 3) + = ( Iodide • 4)

By formula: (I^- • 3CH₄O) + CH₄O = (I^- • 4CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.7 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	24.8	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.3 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B

( Iodide • 4) + = ( Iodide • 5)

By formula: (I^- • 4CH₄O) + CH₄O = (I^- • 5CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.6 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	27.1	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.5 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B

( Iodide • 5) + = ( Iodide • 6)

By formula: (I^- • 5CH₄O) + CH₄O = (I^- • 6CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.6 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	27.4	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.4 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B

( Iodide • 6) + = ( Iodide • 7)

By formula: (I^- • 6CH₄O) + CH₄O = (I^- • 7CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.4 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	28.0	cal/mol*K	PHPMS	Hiraoka and Yamabe, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.1 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; B

( Iodide • 7) + = ( Iodide • 8)

By formula: (I^- • 7CH₄O) + CH₄O = (I^- • 8CH₄O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.1 ± 1.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; Entropy estimated.; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	28.	cal/mol*K	N/A	Hiraoka and Yamabe, 1991	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.8 ± 2.0	kcal/mol	TDAs	Hiraoka and Yamabe, 1991	gas phase; Entropy estimated.; B

Iodide + = CH₄I^-

By formula: I^- + CH₄ = CH₄I^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.60	kcal/mol	N/A	Hiraoka, Mizuno, et al., 2001	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-2.77	kcal/mol	TDAs	Hiraoka, Mizuno, et al., 2001	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + CO₂ = (I^- • CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.7 ± 1.8	kcal/mol	N/A	Piani, Becucci, et al., 2008	gas phase; Stated electron affinity is the Vertical Detachment Energy; B
Δ_rH°	4.0 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.7 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B,M
Δ_rH°	3.20	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	5.60 ± 0.10	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	13.4	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; M
Δ_rS°	18.2	cal/mol*K	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.7 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B
Δ_rG°	0.80 ± 0.10	kcal/mol	TDAs	Banic and Iribarne, 1985	gas phase; B,M
Δ_rG°	0.40 ± 0.10	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • CO₂) + CO₂ = (I^- • 2CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.6 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.7 ± 1.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B,M
Δ_rH°	2.60	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.3	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.7 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2CO₂) + CO₂ = (I^- • 3CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.20	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	3.7 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.6 ± 1.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.4	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-0.6 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B

( Iodide • 3) + = ( Iodide • 4)

By formula: (I^- • 3CO₂) + CO₂ = (I^- • 4CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.80	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	3.6 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.5 ± 1.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-1.0 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B

( Iodide • 4) + = ( Iodide • 5)

By formula: (I^- • 4CO₂) + CO₂ = (I^- • 5CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.70	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	3.1 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	4.3 ± 1.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.0	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-1.4 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B

( Iodide • 5) + = ( Iodide • 6)

By formula: (I^- • 5CO₂) + CO₂ = (I^- • 6CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.0 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	1.80	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B
Δ_rH°	4.2	kcal/mol	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.	cal/mol*K	N/A	Hiraoka, Mizuse, et al., 1987	gas phase; Entropy change calculated or estimated; M

( Iodide • 6) + = ( Iodide • 7)

By formula: (I^- • 6CO₂) + CO₂ = (I^- • 7CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.3 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	1.90	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B

( Iodide • 7) + = ( Iodide • 8)

By formula: (I^- • 7CO₂) + CO₂ = (I^- • 8CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.1 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	1.90	kcal/mol	N/A	Gomez, Taylor, et al., 2002	gas phase; EA=Vertical Detachment Energy. Affinity is stepwise difference in EAs.; B

( Iodide • 8) + = ( Iodide • 9)

By formula: (I^- • 8CO₂) + CO₂ = (I^- • 9CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.8 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 9) + = ( Iodide • 10)

By formula: (I^- • 9CO₂) + CO₂ = (I^- • 10CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	0.9 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 10) + = ( Iodide • 11)

By formula: (I^- • 10CO₂) + CO₂ = (I^- • 11CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.0 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 11) + = ( Iodide • 12)

By formula: (I^- • 11CO₂) + CO₂ = (I^- • 12CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.6 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 12) + = ( Iodide • 13)

By formula: (I^- • 12CO₂) + CO₂ = (I^- • 13CO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.1 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

Iodide + = ( Iodide • )

By formula: I^- + CS₂ = (I^- • CS₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.40 ± 0.20	kcal/mol	TDAs	Hiraoka, Fujimaki, et al., 1993	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	16.7	cal/mol*K	PHPMS	Hiraoka, Fujimaki, et al., 1993	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.4 ± 1.0	kcal/mol	TDAs	Hiraoka, Fujimaki, et al., 1993	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • CS₂) + CS₂ = (I^- • 2CS₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.80 ± 0.20	kcal/mol	TDAs	Hiraoka, Fujimaki, et al., 1993	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.7	cal/mol*K	PHPMS	Hiraoka, Fujimaki, et al., 1993	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.2 ± 1.0	kcal/mol	TDAs	Hiraoka, Fujimaki, et al., 1993	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₂H₃F₃O = (I^- • C₂H₃F₃O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	20.1 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + C₂H₃N = (I^- • C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.9 ± 2.0	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B,M
Δ_rH°	11.10 ± 0.40	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Δ_rH°	11.1 ± 1.1	kcal/mol	LPES	Dessent, Bailey, et al., 1995	gas phase; B
Δ_rH°	11.00 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	12.	kcal/mol	PHPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	13.8	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	18.2	cal/mol*K	PHPMS	Yamdagni and Kebarle, 1972	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	6.4 ± 2.0	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B
Δ_rG°	6.6 ± 2.0	kcal/mol	IMRE	Tanabe, Morgon, et al., 1996	gas phase; Anchored to H2O..I- of Caldwell and Kebarle, 1984; B
Δ_rG°	6.90 ± 0.50	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • C₂H₃N) + C₂H₃N = (I^- • 2C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.40 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	11.10 ± 0.70	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Δ_rH°	11.10 ± 0.40	kcal/mol	N/A	Dessent, Bailey, et al., 1995	gas phase; Vertical Detachment Energy: 2.25±0.08 eV.; B
Δ_rH°	10.50	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.4	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	20.8	cal/mol*K	PHPMS	Yamdagni and Kebarle, 1972	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.90 ± 0.80	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B
Δ_rG°	4.30	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2C₂H₃N) + C₂H₃N = (I^- • 3C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.20 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	9.70 ± 0.70	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Δ_rH°	9.30	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.9	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	22.1	cal/mol*K	PHPMS	Yamdagni and Kebarle, 1972	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.20 ± 0.80	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B
Δ_rG°	2.70	kcal/mol	TDAs	Yamdagni and Kebarle, 1972	gas phase; B

( Iodide • 3) + = ( Iodide • 4)

By formula: (I^- • 3C₂H₃N) + C₂H₃N = (I^- • 4C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.80 ± 0.10	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	7.40 ± 0.80	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.3	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.00 ± 0.40	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B

( Iodide • 4) + = ( Iodide • 5)

By formula: (I^- • 4C₂H₃N) + C₂H₃N = (I^- • 5C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.10 ± 0.30	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	10.60 ± 0.90	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.9	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.4 ± 1.4	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B

( Iodide • 5) + = ( Iodide • 6)

By formula: (I^- • 5C₂H₃N) + C₂H₃N = (I^- • 6C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-2.5 ± 1.0	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B

( Iodide • 6) + = ( Iodide • 7)

By formula: (I^- • 6C₂H₃N) + C₂H₃N = (I^- • 7C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.7 ± 1.1	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B

( Iodide • 7) + = ( Iodide • 8)

By formula: (I^- • 7C₂H₃N) + C₂H₃N = (I^- • 8C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.0 ± 1.2	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B

( Iodide • 8) + = ( Iodide • 9)

By formula: (I^- • 8C₂H₃N) + C₂H₃N = (I^- • 9C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.5 ± 1.4	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B

( Iodide • 9) + = ( Iodide • 10)

By formula: (I^- • 9C₂H₃N) + C₂H₃N = (I^- • 10C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.5 ± 1.5	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B

( Iodide • 10) + = ( Iodide • 11)

By formula: (I^- • 10C₂H₃N) + C₂H₃N = (I^- • 11C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.1 ± 1.6	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B

( Iodide • 11) + = ( Iodide • 12)

By formula: (I^- • 11C₂H₃N) + C₂H₃N = (I^- • 12C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.1 ± 1.7	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B

( Iodide • 13) + = ( Iodide • 14)

By formula: (I^- • 13C₂H₃N) + C₂H₃N = (I^- • 14C₂H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-0.9 ± 1.9	kcal/mol	N/A	Markovich, Perera, et al., 1996	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₂H₄F₃N = (I^- • C₂H₄F₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14.1 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + C₂H₄O₂ = (I^- • C₂H₄O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.9 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.3	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.5 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₂H₆OS = (I^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	15.70	kcal/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B,M
Δ_rH°	16.	kcal/mol	PHPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.7	cal/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	9.20	kcal/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • C₂H₆OS) + C₂H₆OS = (I^- • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.8	kcal/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	22.0	cal/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2C₂H₆OS) + C₂H₆OS = (I^- • 3C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.6	kcal/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	25.1	cal/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

Iodide + = ( Iodide • )

By formula: I^- + C₂H₆O = (I^- • C₂H₆O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.00 ± 0.20	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	12.1 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.9	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	6.11	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	6.4 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B
Δ_rG°	6.0 ± 2.0	kcal/mol	IMRE	Tanabe, Morgon, et al., 1996	gas phase; Anchored to H2O..I- of Caldwell and Kebarle, 1984; B

Iodide + 2 = C₄H₁₂IO₂^-

By formula: I^- + 2C₂H₆O = C₄H₁₂IO₂^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.50 ± 0.20	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.42	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B

Iodide + 3 = C₆H₁₈IO₃^-

By formula: I^- + 3C₂H₆O = C₆H₁₈IO₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.40 ± 0.50	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.51	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B

Iodide + = C₃F₆I^-

By formula: I^- + C₃F₆ = C₃F₆I^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.60 ± 0.30	kcal/mol	TDAs	Hiraoka, Takao, et al., 2002	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.44 ± 0.30	kcal/mol	TDAs	Hiraoka, Takao, et al., 2002	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₃H₂F₆O = (I^- • C₃H₂F₆O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	23.9 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + C₃H₂N₂ = (I^- • C₃H₂N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18.9 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + C₃H₆O = (I^- • C₃H₆O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.0 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + C₃H₆O₂ = (I^- • C₃H₆O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.6 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.5 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₃H₆O₂ = (I^- • C₃H₆O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.6	kcal/mol	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.4	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M

Iodide + = ( Iodide • )

By formula: I^- + C₃H₈O = (I^- • C₃H₈O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.10 ± 0.20	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	12.2 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.1	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	6.33	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	6.5 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + 2 = C₆H₁₆IO₂^-

By formula: I^- + 2C₃H₈O = C₆H₁₆IO₂^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.00 ± 0.30	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.65	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B

Iodide + 3 = C₉H₂₄IO₃^-

By formula: I^- + 3C₃H₈O = C₉H₂₄IO₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.50 ± 0.70	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.54	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₄HF₉O = (I^- • C₄HF₉O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	23.2 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + C₄H₈O₂ = (I^- • C₄H₈O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.7 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.5	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.6 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₄H₁₀O = (I^- • C₄H₁₀O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.10 ± 0.30	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rH°	12.1 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.7	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	6.15	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Δ_rG°	6.5 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + 2 = C₈H₂₀IO₂^-

By formula: I^- + 2C₄H₁₀O = C₈H₂₀IO₂^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.30 ± 0.40	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.32	kcal/mol	TDAs	Bogdanov, Peschke, et al., 1999	gas phase; B

Iodide + = C₅F₈I^-

By formula: I^- + C₅F₈ = C₅F₈I^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.00 ± 0.20	kcal/mol	TDAs	Hiraoka, Fujita, et al., 1905	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.04 ± 0.20	kcal/mol	TDAs	Hiraoka, Fujita, et al., 1905	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₅H₈O₂ = (I^- • C₅H₈O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	15.1 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + C₅H₁₀O₂ = (I^- • C₅H₁₀O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	15.4 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.7	cal/mol*K	PHPMS	Caldwell and Kebarle, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	8.9 ± 1.0	kcal/mol	TDAs	Caldwell and Kebarle, 1984	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₆F₆ = (I^- • C₆F₆)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.0 ± 1.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987, 2	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.3	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	5.8 ± 1.6	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987, 2	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • C₆F₆) + C₆F₆ = (I^- • 2C₆F₆)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.4	kcal/mol	PHPMS	Hiraoka, Mizuse, et al., 1987, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.6	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987, 2	gas phase; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅ClO = (I^- • C₆H₅ClO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	20.5 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	11.6 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
11.6	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅ClO = (I^- • C₆H₅ClO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	21.1 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	12.2 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
12.2	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅FO = (I^- • C₆H₅FO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.6 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.7 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
10.5	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅FO = (I^- • C₆H₅FO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.4 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.5 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
10.7	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₅NO₃ = (I^- • C₆H₅NO₃)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	23.2 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	14.3 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
14.3	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₆O = (I^- • C₆H₆O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17.3 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	8.4 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
8.4	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₆H₆ = (I^- • C₆H₆)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.1 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988, 2	gas phase; B,M
Δ_rH°	9.1 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	14.2	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.8 ± 2.6	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988, 2	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + C₆H₇N = (I^- • C₆H₇N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.9 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + C₇H₅NO = (I^- • C₇H₅NO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	23.8 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	14.9 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
14.9	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₇H₅NO = (I^- • C₇H₅NO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	23.0 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	14.1 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
14.1	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₇H₈O = (I^- • C₇H₈O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.4 ± 1.8	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.	cal/mol*K	N/A	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	7.5 ± 1.0	kcal/mol	IMRE	Paul and Kebarle, 1990	gas phase; ΔGaff at 423 K; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
7.5	423.	PHPMS	Paul and Kebarle, 1990	gas phase; Entropy change calculated or estimated; M

Iodide + = ( Iodide • )

By formula: I^- + C₇H₈ = (I^- • C₇H₈)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.0 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + CeI₃ = ( Iodide • CeI₃)

By formula: I^- + CeI₃ = (I^- • CeI₃)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	67.0 ± 8.0	kcal/mol	TDEq	Chantry, 1976	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	28.	cal/mol*K	MS	Chantry, 1976	gas phase; heated collision chamber; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	59. ± 10.	kcal/mol	TDEq	Chantry, 1976	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + CsI = (I^- • CsI)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	33.700 ± 0.050	kcal/mol	N/A	Wang, Wang, et al., 2010	gas phase; B
Δ_rH°	36.1 ± 1.3	kcal/mol	N/A	Gusarov, Gorokhov, et al., 1979	gas phase; value altered from reference due to conversion from electron convention to ion convention; B

Iodide + CsI₂ = ( Iodide • CsI₂)

By formula: I^- + CsI₂ = (I^- • CsI₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	27.6 ± 3.0	kcal/mol	N/A	Gusarov, Gorokhov, et al., 1979	gas phase; value altered from reference due to conversion from electron convention to ion convention; B

Iodide + DyI₃ = ( Iodide • DyI₃)

By formula: I^- + DyI₃ = (I^- • DyI₃)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.7 ± 2.0	kcal/mol	TDAs	Lelik, Korobov, et al., 1984	gas phase; anion heat reworked from reference due to better dHf(DyI3); value altered from reference due to conversion from electron convention to ion convention; B

Iodide + = ( Iodide • )

By formula: I^- + HBr = (I^- • HBr)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.1 ± 2.0	kcal/mol	TDEq	Caldwell and Kebarle, 1985	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.6	cal/mol*K	PHPMS	Caldwell and Kebarle, 1985	gas phase; switching reaction(I-)SO2; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.2 ± 2.6	kcal/mol	TDEq	Caldwell and Kebarle, 1985	gas phase; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
10.2	300.	PHPMS	Caldwell and Kebarle, 1985	gas phase; switching reaction(I-)SO2; M

Iodide + = ( Iodide • )

By formula: I^- + HCl = (I^- • HCl)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14.8 ± 2.0	kcal/mol	TDAs	Caldwell and Kebarle, 1985	gas phase; B,M
Δ_rH°	14.2	kcal/mol	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.0	cal/mol*K	PHPMS	Caldwell and Kebarle, 1985	gas phase; M
Δ_rS°	22.7	cal/mol*K	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	8.8 ± 2.6	kcal/mol	TDAs	Caldwell and Kebarle, 1985	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + HF = (I^- • HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	15.0 ± 2.0	kcal/mol	Est	Larson and McMahon, 1984	gas phase; Extrapolated from other bihalide data; B
Δ_rH°	15.	kcal/mol	PHPMS	Caldwell, Masucci, et al., 1989	gas phase; M

Iodide + = ( Iodide • )

By formula: I^- + HI = (I^- • HI)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17.0 ± 2.0	kcal/mol	TDEq	Caldwell and Kebarle, 1985	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	24.4	cal/mol*K	PHPMS	Caldwell and Kebarle, 1985	gas phase; switching reaction(I-)SO2; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	9.7 ± 2.6	kcal/mol	TDEq	Caldwell and Kebarle, 1985	gas phase; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
9.7	300.	PHPMS	Caldwell and Kebarle, 1985	gas phase; switching reaction(I-)SO2; M

Iodide + = ( Iodide • )

By formula: I^- + H₂O = (I^- • H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.4 ± 0.7	kcal/mol	AVG	N/A	Average of 6 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	15.3	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	19.3	cal/mol*K	HPMS	Keesee and Castleman, 1980	gas phase; M
Δ_rS°	16.3	cal/mol*K	HPMS	Arshadi, Yamdagni, et al., 1970	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	5.5 ± 0.3	kcal/mol	AVG	N/A	Average of 6 values; Individual data points

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
5.3	300.	HPMS	Banic and Iribarne, 1985	gas phase; electric fields; M

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • H₂O) + H₂O = (I^- • 2H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.90 ± 0.20	kcal/mol	TDAs	Keesee and Castleman, 1980	gas phase; B,M
Δ_rH°	9.50	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B
Δ_rH°	9.50 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	9.8 ± 1.0	kcal/mol	TDAs	Payzant, Yamdagni, et al., 1971	gas phase; B
Δ_rH°	9.8 ± 1.0	kcal/mol	TDAs	Arshadi, Yamdagni, et al., 1970	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.6	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	20.3	cal/mol*K	HPMS	Keesee and Castleman, 1980	gas phase; M
Δ_rS°	19.0	cal/mol*K	HPMS	Arshadi, Yamdagni, et al., 1970	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	4.0 ± 0.5	kcal/mol	AVG	N/A	Average of 6 values; Individual data points

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
4.1	300.	HPMS	Banic and Iribarne, 1985	gas phase; electric fields; M

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2H₂O) + H₂O = (I^- • 3H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.30 ± 0.30	kcal/mol	TDAs	Keesee and Castleman, 1980	gas phase; B,M
Δ_rH°	8.5 ± 2.3	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B
Δ_rH°	9.20 ± 0.20	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	9.4 ± 1.0	kcal/mol	TDAs	Payzant, Yamdagni, et al., 1971	gas phase; B
Δ_rH°	9.4 ± 1.0	kcal/mol	TDAs	Arshadi, Yamdagni, et al., 1970	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.4	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Δ_rS°	21.0	cal/mol*K	HPMS	Keesee and Castleman, 1980	gas phase; M
Δ_rS°	21.3	cal/mol*K	HPMS	Arshadi, Yamdagni, et al., 1970	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.00	kcal/mol	TDAs	Keesee and Castleman, 1980	gas phase; B
Δ_rG°	3.10 ± 0.80	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B
Δ_rG°	3.3 ± 2.0	kcal/mol	TDAs	Kebarle, Arshadi, et al., 1968	gas phase; B,M

( Iodide • 3) + = ( Iodide • 4)

By formula: (I^- • 3H₂O) + H₂O = (I^- • 4H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.20 ± 0.40	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
Δ_rH°	6.9 ± 2.3	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	23.6	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.1 ± 1.6	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B
Δ_rG°	2.2 ± 2.0	kcal/mol	TDAs	Kebarle, Arshadi, et al., 1968	gas phase; B,M

( Iodide • 4) + = ( Iodide • 5)

By formula: (I^- • 4H₂O) + H₂O = (I^- • 5H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.00	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; Entropy estimated; B,M
Δ_rH°	4.20	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	25.	cal/mol*K	N/A	Hiraoka, Mizuse, et al., 1988	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.50	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; Entropy estimated; B

( Iodide • 5) + = ( Iodide • 6)

By formula: (I^- • 5H₂O) + H₂O = (I^- • 6H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.80	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 6) + = ( Iodide • 7)

By formula: (I^- • 6H₂O) + H₂O = (I^- • 7H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.80	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 7) + = ( Iodide • 8)

By formula: (I^- • 7H₂O) + H₂O = (I^- • 8H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	0.70	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 8) + = ( Iodide • 9)

By formula: (I^- • 8H₂O) + H₂O = (I^- • 9H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	3.90	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 9) + = ( Iodide • 10)

By formula: (I^- • 9H₂O) + H₂O = (I^- • 10H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.40	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 10) + = ( Iodide • 11)

By formula: (I^- • 10H₂O) + H₂O = (I^- • 11H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	0.70	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 11) + = ( Iodide • 12)

By formula: (I^- • 11H₂O) + H₂O = (I^- • 12H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.40	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 12) + = ( Iodide • 13)

By formula: (I^- • 12H₂O) + H₂O = (I^- • 13H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.80	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 13) + = ( Iodide • 14)

By formula: (I^- • 13H₂O) + H₂O = (I^- • 14H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	0.20	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 14) + = ( Iodide • 15)

By formula: (I^- • 14H₂O) + H₂O = (I^- • 15H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.20	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • 15) + = ( Iodide • 16)

By formula: (I^- • 15H₂O) + H₂O = (I^- • 16H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.20	kcal/mol	N/A	Markovich, Pollack, et al., 1994	gas phase; For photodissociation plus electron loss. Affinity is difference from lower solvated ion.; B

( Iodide • ) + = ( Iodide • • )

By formula: (I^- • H₂O) + O₂S = (I^- • O₂S • H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	9.00 ± 0.10	kcal/mol	TDAs	Banic and Iribarne, 1985	gas phase; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
7.1	300.	HPMS	Banic and Iribarne, 1985	gas phase; electric fields; M

Iodide + = ( Iodide • )

By formula: I^- + H₂S = (I^- • H₂S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.8 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M

Iodide + = ( Iodide • )

By formula: I^- + H₃N = (I^- • H₃N)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.40 ± 0.30	kcal/mol	TDAs	Evans, Keesee, et al., 1987	gas phase; B,M
Δ_rH°	7.4 ± 1.0	kcal/mol	TDAs	Caldwell, Masucci, et al., 1989	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.9	cal/mol*K	HPMS	Evans, Keesee, et al., 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.20 ± 0.60	kcal/mol	TDAs	Evans, Keesee, et al., 1987	gas phase; B

Iodide + HoI₃ = ( Iodide • HoI₃)

By formula: I^- + HoI₃ = (I^- • HoI₃)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	69.00	kcal/mol	TDAs	Bencze, Kaposi, et al., 1988	gas phase; Data at 0 K. See also Pramann and Rademann, 1999; value altered from reference due to conversion from electron convention to ion convention; B

Iodide + = ( Iodide • )

By formula: I^- + IK = (I^- • IK)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	38.9 ± 2.1	kcal/mol	N/A	Burdukovskaya, Kudin, et al., 1984	gas phase; value altered from reference due to conversion from electron convention to ion convention; B

Iodide + = ( Iodide • )

By formula: I^- + I₂ = (I^- • I₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	24.0	kcal/mol	N/A	Downs and Adams, 1973	gas phase; from Δ_rH(f); M

Iodide + = I₃^-

By formula: I^- + I₂ = I₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	32.5 ± 2.4	kcal/mol	N/A	Taylor, Asmis, et al., 1999	gas phase; B
Δ_rH°	30.1 ± 1.4	kcal/mol	CIDT	Do, Klein, et al., 1997	gas phase; B
Δ_rH°	85.10	kcal/mol	Ther	Finch, Gates, et al., 1977	gas phase; This value is far more bound than expected from other studies; B
Δ_rH°	32.60	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeF3-(t); ; ΔS(EA)=2.8; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	22.50	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeF3-(t); ; ΔS(EA)=2.8; B

Iodide + = I₄P^-

By formula: I^- + I₃P = I₄P^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.9 ± 1.9	kcal/mol	CIDT	Heil, Check, et al., 2002	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + Kr = (I^- • Kr)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.00	kcal/mol	Ther	Zhao, Yourshaw, et al., 1994	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + N₂O = (I^- • N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.7 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	3.8 ± 0.3	kcal/mol	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	14.1	cal/mol*K	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; M

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • N₂O) + N₂O = (I^- • 2N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.9 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	3.3 ± 0.3	kcal/mol	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	14.2	cal/mol*K	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; M

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2N₂O) + N₂O = (I^- • 3N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.7 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B
Δ_rH°	3.2	kcal/mol	PHPMS	Hiraoka, Aruga, et al., 1993	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	15.	cal/mol*K	N/A	Hiraoka, Aruga, et al., 1993	gas phase; Entropy change calculated or estimated; M

( Iodide • 3) + = ( Iodide • 4)

By formula: (I^- • 3N₂O) + N₂O = (I^- • 4N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.8 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 4) + = ( Iodide • 5)

By formula: (I^- • 4N₂O) + N₂O = (I^- • 5N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.7 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 5) + = ( Iodide • 6)

By formula: (I^- • 5N₂O) + N₂O = (I^- • 6N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.3 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 6) + = ( Iodide • 7)

By formula: (I^- • 6N₂O) + N₂O = (I^- • 7N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.2 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 7) + = ( Iodide • 8)

By formula: (I^- • 7N₂O) + N₂O = (I^- • 8N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.1 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 8) + = ( Iodide • 9)

By formula: (I^- • 8N₂O) + N₂O = (I^- • 9N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.4 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 9) + = ( Iodide • 10)

By formula: (I^- • 9N₂O) + N₂O = (I^- • 10N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.8 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 10) + = ( Iodide • 11)

By formula: (I^- • 10N₂O) + N₂O = (I^- • 11N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.0 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 11) + = ( Iodide • 12)

By formula: (I^- • 11N₂O) + N₂O = (I^- • 12N₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.3 ± 2.0	kcal/mol	PDis	Arnold, Bradforth, et al., 1995	gas phase; EA given is Vertical Detachment Energy. Affinity: difference between successive EAs in (Y); B

( Iodide • 4294967295) + = Iodide

By formula: (I^- • 4294967295Na) + Na = I^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.6 ± 2.3	kcal/mol	N/A	Miller, Leopold, et al., 1986	gas phase; B

Iodide + = ( Iodide • )

By formula: I^- + O₂S = (I^- • O₂S)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14.3 ± 2.0	kcal/mol	TDAs	Caldwell and Kebarle, 1985	gas phase; B,M
Δ_rH°	12.90 ± 0.10	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.6	cal/mol*K	PHPMS	Caldwell and Kebarle, 1985	gas phase; M
Δ_rS°	20.2	cal/mol*K	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	9.0 ± 2.6	kcal/mol	TDAs	Caldwell and Kebarle, 1985	gas phase; B
Δ_rG°	1.70 ± 0.10	kcal/mol	TDAs	Banic and Iribarne, 1985	gas phase; B
Δ_rG°	6.80 ± 0.20	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
9.0	301.	HPMS	Banic and Iribarne, 1985	gas phase; electric fields; M

( Iodide • ) + = ( Iodide • • )

By formula: (I^- • O₂S) + H₂O = (I^- • H₂O • O₂S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.50 ± 0.10	kcal/mol	TDAs	Banic and Iribarne, 1985	gas phase; B

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
3.5	300.	HPMS	Banic and Iribarne, 1985	gas phase; electric fields; M

( Iodide • • ) + = ( Iodide • 2 • )

By formula: (I^- • O₂S • H₂O) + O₂S = (I^- • 2O₂S • H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	7.10 ± 0.10	kcal/mol	TDAs	Banic and Iribarne, 1985	gas phase; B

( Iodide • ) + = ( Iodide • 2)

By formula: (I^- • O₂S) + O₂S = (I^- • 2O₂S)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.10 ± 0.10	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	21.6	cal/mol*K	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	3.60 ± 0.30	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B

( Iodide • 2) + = ( Iodide • 3)

By formula: (I^- • 2O₂S) + O₂S = (I^- • 3O₂S)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.20 ± 0.20	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	24.7	cal/mol*K	HPMS	Keesee, Lee, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.80 ± 0.60	kcal/mol	TDAs	Keesee, Lee, et al., 1980	gas phase; B

Iodide + = IO₃S^-

By formula: I^- + O₃S = IO₃S^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	38.5 ± 2.1	kcal/mol	CIDT	Hao, Gilbert, et al., 2006	gas phase; B

Iodide + = IXe^-

By formula: I^- + Xe = IXe^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.60	kcal/mol	N/A	Lenzer, Furlanetto, et al., 1998	gas phase; B
Δ_rH°	2.80	kcal/mol	TDAs	Wada, Kikkawa, et al., 2007	gas phase; Entropy estimated; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-1.97	kcal/mol	TDAs	Wada, Kikkawa, et al., 2007	gas phase; Entropy estimated; B

References

Go To: Top, Reaction thermochemistry data, Ion clustering data, Notes

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Downs and Adams, 1973
Downs, A.J.; Adams, G.J., Comprehensive Inorganic Chemistry, J. C. Bailar, H. J. Emeleus, R. Nyholm and A. F. Trotman - Dickerson, ed(s)., Pergamon Press, New York, 1973, 1543. [all data]

Heil, Check, et al., 2002
Heil, T.E.; Check, C.E.; Lobring, K.C.; Sunderlin, L.S., The thermochemistry of phosphorus tetrahalide anions, J. Phys. Chem. A, 2002, 106, 42, 10043-10048, https://doi.org/10.1021/jp021386y . [all data]

Hao, Gilbert, et al., 2006
Hao, C.; Gilbert, T.M.; Sunderlin, L.S., The Bond Dissociation Energies of SO3-X- (X = F, Cl, Br, and I), Can. J. Chem., 2006, 83, 11, 2013-2019, https://doi.org/10.1139/v05-216 . [all data]

Notes

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Symbols used in this document:

T Temperature

Δ_rG° Free energy of reaction at standard conditions

Δ_rH° Enthalpy of reaction at standard conditions

Δ_rS° Entropy of reaction at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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T	Temperature
Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions
Δ_rS°	Entropy of reaction at standard conditions