Fluorine anion

• Formula: F^-
• Molecular weight: 18.9989518
• IUPAC Standard InChI:
  

  InChI=1S/FH/h1H/p-1 Download the identifier in a file.

• IUPAC Standard InChIKey: KRHYYFGTRYWZRS-UHFFFAOYSA-M
• CAS Registry Number: 16984-48-8
• Chemical structure:
  This structure is also available as a 2d Mol file
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• Information on this page:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data (reactions 1 to 50)
  • Gas phase ion energetics data
  • Ion clustering data
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data: reactions 51 to 100, reactions 101 to 150, reactions 151 to 200, reactions 201 to 235
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Gas phase thermochemistry data

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Ion clustering data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Reactions 1 to 50

 +  = (  )

By formula: F^- + BF₃ = (F^-  BF₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	82. ± 20.	kcal/mol	AVG	N/A	Average of 6 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
rG°	63.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  =

By formula: F^- + H⁺ = HF

Quantity	Value	Units	Method	Reference	Comment
rH°	372. ± 1.	kcal/mol	AVG	N/A	Average of 6 out of 7 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
rG°	365.67 ± 0.18	kcal/mol	H-TS	Blondel, Delsart, et al., 2001	gas phase; Given: 3.4011895(25) eV, or 27432.446(19) cm-1, or 78.433266(577) kcal/mol; B
rG°	365.53	kcal/mol	H-TS	Martin and Hepburn, 2000	gas phase; Given: 371.334±0.003 kcal/mol (corr to 298K with data from Wagman, Evans, et al., 1982).H(0K)=370.422±0.003; B
rG°	365.67 ± 0.18	kcal/mol	H-TS	Blondel, Cacciani, et al., 1989	gas phase; Reported: 3.401190±0.000004 eV. acidity includes 0.9 kcal 0 to 298 K correction.; B
rG°	365.5 ± 2.0	kcal/mol	IMRE	Bierbaum, Schmidt, et al., 1981	gas phase; B
rG°	359.40	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeCl3-; ; «DELTA»S(EA)=5.0; B

 +  = (  )

By formula: F^- + O₂S = (F^-  O₂S)

Quantity	Value	Units	Method	Reference	Comment
rH°	53.8 ± 2.2	kcal/mol	CIDT	Lobring, Check, et al., 2003	gas phase; B
rH°	53.0 ± 2.5	kcal/mol	CIDT	Squires, 1992	gas phase; B
rH°	43.8	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rH°	43.8 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
rH°	59.	kcal/mol	SAMS	Robbiani and Franklin, 1979	gas phase; Cl- + CO2ClF --> SO2F- + Cl2, «DELTA»rH>; M
Quantity	Value	Units	Method	Reference	Comment
rS°	24.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rS°	23.0	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	36.6	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rG°	36.9 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + F₂OS = (F^-  F₂OS)

Quantity	Value	Units	Method	Reference	Comment
rH°	35.8	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rH°	37.4	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rH°	37.4 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	24.2	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	30.2	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rG°	30.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

Free energy of reaction

rG° (kcal/mol)	T (K)	Method	Reference	Comment
27.6	2988.	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

 +  = (  )

By formula: F^- + F₃P = (F^-  F₃P)

Quantity	Value	Units	Method	Reference	Comment
rH°	40.2	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rH°	40.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
rH°	50.0 ± 5.0	kcal/mol	IMRB	Sullivan and Beauchamp, 1978	gas phase; Fluoride Affinity: < OPF3, > F, SF4, Me3SiF, HCN, SO2; B
Quantity	Value	Units	Method	Reference	Comment
rS°	25.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rS°	25.5	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	32.6	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rG°	32.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + HF = (F^-  HF)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
rH°	45.8 ± 1.6	kcal/mol	CIDC	Wenthold and Squires, 1995	gas phase; B
rH°	38.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
rH°	>34.6 ± 4.6	kcal/mol	Ther	Heni and Illenberger, 1985	gas phase; From CHF=CHF. Outdataed HC2. thermo used. Current value ( Berkowitz, Ellison, et al., 1994) implies Haff>57.; B
Quantity	Value	Units	Method	Reference	Comment
rS°	21.9	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	32.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

Free energy of reaction

rG° (kcal/mol)	T (K)	Method	Reference	Comment
32.0	289.	ICR	Larson and McMahon, 1983	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

 +  = (  )

By formula: F^- + AlF₃ = (F^-  AlF₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	120. ± 20.	kcal/mol	AVG	N/A	Average of 7 values; Individual data points

 + F₄U = (  F₄U)

By formula: F^- + F₄U = (F^-  F₄U)

Quantity	Value	Units	Method	Reference	Comment
rH°	101. ± 6.	kcal/mol	AVG	N/A	Average of 6 values; Individual data points

 +  = (  )

By formula: F^- + F₅P = (F^-  F₅P)

Quantity	Value	Units	Method	Reference	Comment
rH°	78.6 ± 3.3	kcal/mol	TDAs	Aleshina, Borshchevskii, et al., 1996	gas phase; The discrepancy with Larson and McMahon, 1985 is discussed but not resolved.; value altered from reference due to conversion from electron convention to ion convention; B
rH°	85. ± 10.	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
rH°	101.0 ± 8.0	kcal/mol	Ther	Mallouk, Rosenthal, et al., 1984	gas phase; Fluoride affinities from this method appear to be consistently about 10 kcal/mol too bound; B
Quantity	Value	Units	Method	Reference	Comment
rG°	74. ± 10.	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  = (  )

By formula: F^- + CF₂O = (F^-  CF₂O)

Quantity	Value	Units	Method	Reference	Comment
rH°	42.6	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rH°	42.6	kcal/mol	ICR	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rS°	29.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rS°	29.0	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	34.0	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rG°	34.0	kcal/mol	ICR	Larson and McMahon, 1984	gas phase; switching reaction(F-)PF3; M
rG°	34.0	kcal/mol	ICR	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

 +  = (  )

By formula: F^- + F₃OP = (F^-  F₃OP)

Quantity	Value	Units	Method	Reference	Comment
rH°	47.9 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
rH°	48.0 ± 9.0	kcal/mol	IMRB	Rhyne and Dillard, 1971	gas phase; Fluoride Affinity: SF4>F3PO>SF5. Orignal value 32±10, now reval. with new affinities; B
Quantity	Value	Units	Method	Reference	Comment
rS°	26.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	40.1 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + F₄S = (F^-  F₄S)

Quantity	Value	Units	Method	Reference	Comment
rH°	43.8	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rH°	43.8	kcal/mol	ICR	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rS°	25.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rS°	25.6	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	36.2	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rG°	36.2	kcal/mol	ICR	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

 +  = (  )

By formula: F^- + F₄Si = (F^-  F₄Si)

Quantity	Value	Units	Method	Reference	Comment
rH°	>29.10 ± 0.50	kcal/mol	N/A	Kawamata, Neigishi, et al., 1996	gas phase; B
rH°	68.0 ± 5.0	kcal/mol	IMRB	Murphy and Beauchamp, 1977	gas phase; Fluoride Affinity: <BF3, >iPr2BF; B
rH°	60.0 ± 4.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	54.1 ± 4.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B
rG°	51.	kcal/mol	ICR	Larson and McMahon, 1984	gas phase; switching reaction(F-)H2O, DG+-2. kcal/mol; 70 ARS/YAM; M

(  4294967295) +  =

By formula: (F^-  4294967295F₄S) + F₄S = F^-

Quantity	Value	Units	Method	Reference	Comment
rH°	54.9 ± 2.3	kcal/mol	CIDT	Lobring, Check, et al., 2003, 2	gas phase; B
rH°	54.1 ± 6.5	kcal/mol	Ther	Leffert, Tang, et al., 1974	gas phase; From SF6; B
rH°	>40.5 ± 3.4	kcal/mol	IMRB	Babcock and Streit, 1981	gas phase; Fluoride Affinity: SF4 > SF5; B
rH°	43.8 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B
Quantity	Value	Units	Method	Reference	Comment
rG°	36.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 + C₃F₆O = (  C₃F₆O)

By formula: F^- + C₃F₆O = (F^-  C₃F₆O)

Quantity	Value	Units	Method	Reference	Comment
rH°	47.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	28.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	38.8 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
rG°	38.8	kcal/mol	ICR	Larson and McMahon, 1984	gas phase; switching reaction(F-)CF3COF; M

 +  = (  )

By formula: F^- + C₃H₉B = (F^-  C₃H₉B)

Quantity	Value	Units	Method	Reference	Comment
rH°	58.50	kcal/mol	IMRB	Murphy and Beauchamp, 1977, 2	gas phase; MeSiF3>Me3B>SF4; B
rH°	47.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	25.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	39.7 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + C₆H₁₅B = (F^-  C₆H₁₅B)

Quantity	Value	Units	Method	Reference	Comment
rH°	62.00	kcal/mol	IMRB	Murphy and Beauchamp, 1977, 2	gas phase; iPr3B>Et3B>MeSiF3; B
rH°	51.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	25.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	43.5 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + C₃H₉FSi = (F^-  C₃H₉FSi)

Quantity	Value	Units	Method	Reference	Comment
rH°	38.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
rH°	<54. ± 10.	kcal/mol	IMRB	Murphy and Beauchamp, 1977	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
rS°	22.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	31.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + C₂H₂F₄O = (F^-  C₂H₂F₄O)

Quantity	Value	Units	Method	Reference	Comment
rH°	36.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	27.2	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	28.3	kcal/mol	ICR	Larson and McMahon, 1984	gas phase; switching reaction(F-)SO2F2; M
rG°	27.9 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + CH₃F₃Si = (F^-  CH₃F₃Si)

Quantity	Value	Units	Method	Reference	Comment
rH°	61.5 ± 5.0	kcal/mol	IMRB	Murphy and Beauchamp, 1977	gas phase; B
rH°	50.5 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	25.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	43.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + F₂O₂S = (F^-  F₂O₂S)

Quantity	Value	Units	Method	Reference	Comment
rH°	35.8 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
rH°	30.0 ± 6.0	kcal/mol	Ther	Galembeck, Faigle, et al., 1978	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
rS°	27.5	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	27.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + H₂S = (F^-  H₂S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
rH°	34.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	18.8	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	29.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + AsF₃ = (F^-  AsF₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	48.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	24.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	41.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 + C₂F₄O = (  C₂F₄O)

By formula: F^- + C₂F₄O = (F^-  C₂F₄O)

Quantity	Value	Units	Method	Reference	Comment
rH°	45.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	28.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	37.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 + C₂F₂O₂ = (  C₂F₂O₂)

By formula: F^- + C₂F₂O₂ = (F^-  C₂F₂O₂)

Quantity	Value	Units	Method	Reference	Comment
rH°	45.7 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	29.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	37.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + C₃F₆O = (F^-  C₃F₆O)

Quantity	Value	Units	Method	Reference	Comment
rH°	49.7 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	27.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	41.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 + C₃F₅N = (  C₃F₅N)

By formula: F^- + C₃F₅N = (F^-  C₃F₅N)

Quantity	Value	Units	Method	Reference	Comment
rH°	30.1 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; B,M
rH°	30.3	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rS°	24.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rS°	22.8	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	23.3 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; B,M
rG°	23.1	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

 +  = (  )

By formula: F^- + C₆H₆O = (F^-  C₆H₆O)

Quantity	Value	Units	Method	Reference	Comment
rH°	41.3 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	26.3	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	33.5 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + C₂H₅FO = (F^-  C₂H₅FO)

Quantity	Value	Units	Method	Reference	Comment
rH°	34.8 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	26.3	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	27.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + CH₂O₂ = (F^-  CH₂O₂)

Quantity	Value	Units	Method	Reference	Comment
rH°	45.3 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	24.2	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	38.1 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + C₂H₄O₂ = (F^-  C₂H₄O₂)

Quantity	Value	Units	Method	Reference	Comment
rH°	44.1 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	25.6	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	36.5 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + CHN = (F^-  CHN)

Quantity	Value	Units	Method	Reference	Comment
rH°	39.5 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	22.2	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	32.9 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + CH₄S = (F^-  CH₄S)

Quantity	Value	Units	Method	Reference	Comment
rH°	34.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	23.2	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	27.3 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + C₂H₃F₃O = (F^-  C₂H₃F₃O)

Quantity	Value	Units	Method	Reference	Comment
rH°	39.1 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	26.8	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	31.1 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 + F₃Sc = (  F₃Sc)

By formula: F^- + F₃Sc = (F^-  F₃Sc)

Quantity	Value	Units	Method	Reference	Comment
rH°	113.3 ± 3.6	kcal/mol	TDAs	Boltalina, Borshchevskii, et al., 1992	gas phase; Critical review; value altered from reference due to conversion from electron convention to ion convention; B
rH°	112.3 ± 2.4	kcal/mol	TDEq	Nikitin, Igolkina, et al., 1986	gas phase; Reanalyzed literature data, 4.3 kcal < AlF3; B
rH°	116.5 ± 2.3	kcal/mol	TDEq	Nikitin, Sidorov, et al., 1981	gas phase; Fluoride Affinity: 4.1 kcal < AlF3; value altered from reference due to conversion from electron convention to ion convention; B
rH°	118.2 ± 2.5	kcal/mol	TDEq	Skokan, Nikitin, et al., 1981	gas phase; Fluoride Affinity: 2.5 kcal < AlF3.; value altered from reference due to conversion from electron convention to ion convention; B
rH°	112.	kcal/mol	MS	Pyatenko, Gusarov, et al., 1981	gas phase; Knudsen cell; M

(  ) +  = (  2)

By formula: (F^-  H₂O) + H₂O = (F^-  2H₂O)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
rH°	19.20 ± 0.50	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; Stated electron affinity is the Vertical Detachment Energy; B,M
rH°	16.6 ± 1.0	kcal/mol	TDAs	Payzant, Yamdagni, et al., 1971	gas phase; B
rH°	16.6 ± 1.0	kcal/mol	TDAs	Arshadi, Yamdagni, et al., 1970	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	22.2	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
rS°	18.7	cal/mol*K	HPMS	Arshadi, Yamdagni, et al., 1970	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rG°	12.5 ± 1.6	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; Stated electron affinity is the Vertical Detachment Energy; B
rG°	11.0 ± 1.4	kcal/mol	TDAs	Payzant, Yamdagni, et al., 1971	gas phase; B
rG°	11.00	kcal/mol	TDAs	Arshadi, Yamdagni, et al., 1970	gas phase; B

 + C₄H₁₀BF = (  C₄H₁₀BF)

By formula: F^- + C₄H₁₀BF = (F^-  C₄H₁₀BF)

Quantity	Value	Units	Method	Reference	Comment
rH°	64.00	kcal/mol	IMRB	Murphy and Beauchamp, 1977, 2	gas phase; Fluoride Affinity: iPr3B > Et2BF > Et3B; B
rH°	58.0 ± 5.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	51.5 ± 5.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  = (  )

By formula: F^- + CO₂ = (F^-  CO₂)

Quantity	Value	Units	Method	Reference	Comment
rH°	32.07	kcal/mol	N/A	Arnold, Bradforth, et al., 1995	gas phase; B
rH°	32.3 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B,M
rH°	31.7 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; B,M
rH°	33.0 ± 3.0	kcal/mol	IMRE	McMahon and Northcott, 1978	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
rS°	26.7	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1987	gas phase; M
rS°	24.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	24.3 ± 2.0	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1987	gas phase; B
rG°	24.5 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; B,M
rG°	11.6	kcal/mol	FA	Spears and Ferguson, 1973	gas phase; DG>; M

 +  = (  )

By formula: F^- + F₄OS = (F^-  F₄OS)

Quantity	Value	Units	Method	Reference	Comment
rH°	58.0 ± 3.0	kcal/mol	IMRE	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
rH°	68. ± 10.	kcal/mol	IMRB	Arnold, Miller, et al., 2002	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
rG°	52.7 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

(  2) +  = (  3)

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

Bond type: Hydrogen bond (negative ion to hydride)

Quantity	Value	Units	Method	Reference	Comment
rH°	15.30 ± 0.40	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B,M
rH°	13.7 ± 1.0	kcal/mol	TDAs	Payzant, Yamdagni, et al., 1971	gas phase; B
rH°	13.7 ± 1.0	kcal/mol	TDAs	Arshadi, Yamdagni, et al., 1970	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	22.9	cal/mol*K	PHPMS	Hiraoka, Mizuse, et al., 1988	gas phase; M
rS°	20.4	cal/mol*K	HPMS	Arshadi, Yamdagni, et al., 1970	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rG°	8.4 ± 1.3	kcal/mol	TDAs	Hiraoka, Mizuse, et al., 1988	gas phase; B
rG°	7.6 ± 1.4	kcal/mol	TDAs	Payzant, Yamdagni, et al., 1971	gas phase; B
rG°	7.60	kcal/mol	TDAs	Arshadi, Yamdagni, et al., 1970	gas phase; B

 + AsFS^- = (  AsFS^-)

By formula: F^- + AsFS^- = (F^-  AsFS^-)

Quantity	Value	Units	Method	Reference	Comment
rH°	56.0 ± 6.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	47.5 ± 6.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 + AsFO = (  AsFO)

By formula: F^- + AsFO = (F^-  AsFO)

Quantity	Value	Units	Method	Reference	Comment
rH°	54.0 ± 7.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	48.0 ± 7.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  = (  )

By formula: F^- + OS₂ = (F^-  OS₂)

Quantity	Value	Units	Method	Reference	Comment
rH°	44.0 ± 3.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	37.0 ± 3.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 + C₄H₄F₆O = (  C₄H₄F₆O)

By formula: F^- + C₄H₄F₆O = (F^-  C₄H₄F₆O)

Quantity	Value	Units	Method	Reference	Comment
rH°	46.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B
Quantity	Value	Units	Method	Reference	Comment
rG°	37.9 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  = (  )

By formula: F^- + C₄HF₉O = (F^-  C₄HF₉O)

Quantity	Value	Units	Method	Reference	Comment
rH°	56.3 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B
Quantity	Value	Units	Method	Reference	Comment
rG°	47.9 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  = (  )

By formula: F^- + C₃H₉BO₃ = (F^-  C₃H₉BO₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	42.0 ± 4.0	kcal/mol	IMRB	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	34.0 ± 3.0	kcal/mol	IMRB	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  = (  )

By formula: F^- + C₆H₁₅BO₃ = (F^-  C₆H₁₅BO₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	44.0 ± 3.0	kcal/mol	IMRB	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	36.6 ± 2.0	kcal/mol	IMRB	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  = (  )

By formula: F^- + C₂H₆BFO₂ = (F^-  C₂H₆BFO₂)

Quantity	Value	Units	Method	Reference	Comment
rH°	52.0 ± 5.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	45.4 ± 5.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  = (  )

By formula: F^- + C₃H₂F₆O = (F^-  C₃H₂F₆O)

Quantity	Value	Units	Method	Reference	Comment
rH°	47.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B
Quantity	Value	Units	Method	Reference	Comment
rG°	38.9 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 + FPS = F₂PS^-

By formula: F^- + FPS = F₂PS^-

Quantity	Value	Units	Method	Reference	Comment
rH°	62.0 ± 5.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B
Quantity	Value	Units	Method	Reference	Comment
rG°	56.0 ± 4.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Ion clustering data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: John E. Bartmess

Protonation reactions

 +  =

By formula: F^- + H⁺ = HF

Quantity	Value	Units	Method	Reference	Comment
rH°	372. ± 1.	kcal/mol	AVG	N/A	Average of 6 out of 7 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
rG°	365.67 ± 0.18	kcal/mol	H-TS	Blondel, Delsart, et al., 2001	gas phase; Given: 3.4011895(25) eV, or 27432.446(19) cm-1, or 78.433266(577) kcal/mol
rG°	365.53	kcal/mol	H-TS	Martin and Hepburn, 2000	gas phase; Given: 371.334±0.003 kcal/mol (corr to 298K with data from Wagman, Evans, et al., 1982).H(0K)=370.422±0.003
rG°	365.67 ± 0.18	kcal/mol	H-TS	Blondel, Cacciani, et al., 1989	gas phase; Reported: 3.401190±0.000004 eV. acidity includes 0.9 kcal 0 to 298 K correction.
rG°	365.5 ± 2.0	kcal/mol	IMRE	Bierbaum, Schmidt, et al., 1981	gas phase
rG°	359.40	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; FeCl3-; ; «DELTA»S(EA)=5.0

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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

= H₂AlF₂^-

By formula: F^- = H₂AlF₂^-

Quantity	Value	Units	Method	Reference	Comment
rH°	97.5 ± 4.0	kcal/mol	CIDT	Williams and Wenthold, 2011	gas phase; B

= H₃AlF^-

By formula: F^- = H₃AlF^-

Quantity	Value	Units	Method	Reference	Comment
rH°	93. ± 50.	kcal/mol	N/A	Williams and Wenthold, 2011	gas phase; B

 +  = (  )

By formula: F^- + AlClF₂ = (F^-  AlClF₂)

Quantity	Value	Units	Method	Reference	Comment
rH°	117.4 ± 2.9	kcal/mol	TDAs	Pervova, Korobov, et al., 1992	gas phase; Thermo at 0K, experiments at 800-1100 K; value altered from reference due to conversion from electron convention to ion convention; B

 +  = (  )

By formula: F^- + AlCl₂F = (F^-  AlCl₂F)

Quantity	Value	Units	Method	Reference	Comment
rH°	119.3 ± 2.9	kcal/mol	TDAs	Pervova, Korobov, et al., 1992	gas phase; Thermo at 0K, experiments at 800-1100 K; value altered from reference due to conversion from electron convention to ion convention; B

 + AlCl₃ = (  AlCl₃)

By formula: F^- + AlCl₃ = (F^-  AlCl₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	120.9 ± 3.0	kcal/mol	TDAs	Pervova, Korobov, et al., 1992	gas phase; Thermo at 0K, experiments at 800-1100 K; value altered from reference due to conversion from electron convention to ion convention; B

 +  = (  )

By formula: F^- + AlF₃ = (F^-  AlF₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	120. ± 20.	kcal/mol	AVG	N/A	Average of 7 values; Individual data points

(  ) +  = (  2)

By formula: (F^-  AlF₃) + AlF₃ = (F^-  2AlF₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	56.	kcal/mol	MS	Pyatenko, Gusarov, et al., 1981	gas phase; Knudsen cell; M
rH°	48.8	kcal/mol	MS	Nikitin, Skokan, et al., 1979	gas phase; Knudsen cell; M

 +  = ArF^-

By formula: F^- + Ar = ArF^-

Quantity	Value	Units	Method	Reference	Comment
rH°	2.00	kcal/mol	TDAs	Wada, Kikkawa, et al., 2007	gas phase; Entropy estimated; B
Quantity	Value	Units	Method	Reference	Comment
rG°	-3.96	kcal/mol	TDAs	Wada, Kikkawa, et al., 2007	gas phase; Entropy estimated; B

 + AsFO = (  AsFO)

By formula: F^- + AsFO = (F^-  AsFO)

Quantity	Value	Units	Method	Reference	Comment
rH°	54.0 ± 7.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	48.0 ± 7.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 + AsFS^- = (  AsFS^-)

By formula: F^- + AsFS^- = (F^-  AsFS^-)

Quantity	Value	Units	Method	Reference	Comment
rH°	56.0 ± 6.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rG°	47.5 ± 6.0	kcal/mol	IMRB	Larson and McMahon, 1987	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 +  = (  )

By formula: F^- + AsF₃ = (F^-  AsF₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	48.2 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	24.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	41.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + AsF₅ = (F^-  AsF₅)

Quantity	Value	Units	Method	Reference	Comment
rH°	>85. ± 10.	kcal/mol	N/A	Haartz and McDaniel, 1973	gas phase; Greater than BCl3; B
Quantity	Value	Units	Method	Reference	Comment
rG°	>74. ± 10.	kcal/mol	IMRB	Haartz and McDaniel, 1973	gas phase; Greater than BCl3; B

 + AuF₃ = (  AuF₃)

By formula: F^- + AuF₃ = (F^-  AuF₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	101.8 ± 6.0	kcal/mol	TDEq	Chilingarov, Korobov, et al., 1986	gas phase; Fluoride Affinity: 1.2±5.0 kcal/mol > MnF3; value altered from reference due to conversion from electron convention to ion convention; B

 +  = (  )

By formula: F^- + BCl₃ = (F^-  BCl₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	>85. ± 10.	kcal/mol	IMRB	Haartz and McDaniel, 1973	gas phase; Greater than PF5 ( Larson and McMahon, 1985); B
rH°	>40.50	kcal/mol	Ther	Stockdale, Nelson, et al., 1972	gas phase; Fluoride Affinity: > SF5; new value of latter from Grimsrud, Chowdhury, et al., 1985; B
Quantity	Value	Units	Method	Reference	Comment
rG°	>74. ± 10.	kcal/mol	IMRB	Haartz and McDaniel, 1973	gas phase; Greater than PF5 ( Larson and McMahon, 1985); B

 + BFO = (  BFO)

By formula: F^- + BFO = (F^-  BFO)

Quantity	Value	Units	Method	Reference	Comment
rH°	48. ± 3.	kcal/mol	ICR	Larson and McMahon, 1987	gas phase; bracketing; M

 +  = (  )

By formula: F^- + BF₃ = (F^-  BF₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	82. ± 20.	kcal/mol	AVG	N/A	Average of 6 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
rG°	63.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B

 + BeF₂ = (  BeF₂)

By formula: F^- + BeF₂ = (F^-  BeF₂)

Quantity	Value	Units	Method	Reference	Comment
rH°	97.3 ± 2.3	kcal/mol	TDEq	Nikitin, Sorokin, et al., 1980	gas phase; Fluoride Affinity: 19.9±1.7 kcal < AlF3; value altered from reference due to conversion from electron convention to ion convention; B

 + Be₂F₄ = (  Be₂F₄)

By formula: F^- + Be₂F₄ = (F^-  Be₂F₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	111.0 ± 2.0	kcal/mol	TDEq	Nikitin, Sorokin, et al., 1980	gas phase; Fluoride Affinity of Be2F4: 6.3±2 kcal < AlF3; value altered from reference due to conversion from electron convention to ion convention; B

 +  = (  )

By formula: F^- + CF₂O = (F^-  CF₂O)

Quantity	Value	Units	Method	Reference	Comment
rH°	42.6	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rH°	42.6	kcal/mol	ICR	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rS°	29.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rS°	29.0	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	34.0	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
rG°	34.0	kcal/mol	ICR	Larson and McMahon, 1984	gas phase; switching reaction(F-)PF3; M
rG°	34.0	kcal/mol	ICR	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M

 +  = (  )

By formula: F^- + CF₄ = (F^-  CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	6.4	kcal/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	22.	cal/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

(  ) +  = (  2)

By formula: (F^-  CF₄) + CF₄ = (F^-  2CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	5.9	kcal/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	22.	cal/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

(  2) +  = (  3)

By formula: (F^-  2CF₄) + CF₄ = (F^-  3CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	4.1	kcal/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	17.	cal/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

(  3) +  = (  4)

By formula: (F^-  3CF₄) + CF₄ = (F^-  4CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	3.9	kcal/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	19.	cal/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

(  4) +  = (  5)

By formula: (F^-  4CF₄) + CF₄ = (F^-  5CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	2.4	kcal/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
rS°	19.	cal/mol*K	N/A	Hiraoka, Nasu, et al., 1995	gas phase; Entropy change calculated or estimated; M

 + CHFO = (  CHFO)

By formula: F^- + CHFO = (F^-  CHFO)

Quantity	Value	Units	Method	Reference	Comment
rH°	>18.10	kcal/mol	IMRB	Karpas and Klein, 1977	gas phase; FCO- + HCFO ->. Computations indicate HOF(A-) ca. -134, dHaff ca. 33 kcal/mol; B

 +  = (  )

By formula: F^- + CHF₃ = (F^-  CHF₃)

Quantity	Value	Units	Method	Reference	Comment
rH°	27.1 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	25.2	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	19.6 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; B,M

 +  = (  )

By formula: F^- + CHN = (F^-  CHN)

Quantity	Value	Units	Method	Reference	Comment
rH°	39.5 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	22.2	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	32.9 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + CH₂F₂Si = (F^-  CH₂F₂Si)

Quantity	Value	Units	Method	Reference	Comment
rH°	46. ± 2.	kcal/mol	ICR	Allison and McMahon, 1990	gas phase; bracketing; M

 +  = (  )

By formula: F^- + CH₂O₂ = (F^-  CH₂O₂)

Quantity	Value	Units	Method	Reference	Comment
rH°	45.3 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	24.2	cal/mol*K	N/A	Larson and McMahon, 1983	gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	38.1 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1983	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = (  )

By formula: F^- + CH₃BF₂O = (F^-  CH₃BF₂O)

Quantity	Value	Units	Method	Reference	Comment
rH°	62.	kcal/mol	ICR	Larson and McMahon, 1985	gas phase; «DELTA»rH>, bracketing; M

 +  = (  )

By formula: F^- + CH₃F₃Si = (F^-  CH₃F₃Si)

Quantity	Value	Units	Method	Reference	Comment
rH°	61.5 ± 5.0	kcal/mol	IMRB	Murphy and Beauchamp, 1977	gas phase; B
rH°	50.5 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M
Quantity	Value	Units	Method	Reference	Comment
rS°	25.	cal/mol*K	N/A	Larson and McMahon, 1985	gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity	Value	Units	Method	Reference	Comment
rG°	43.0 ± 2.0	kcal/mol	IMRE	Larson and McMahon, 1985	gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B,M

 +  = CH₃D₄FO^-

By formula: F^- + CH₄O = CH₃D₄FO^-

Quantity	Value	Units	Method	Reference	Comment
rH°	29.8 ± 2.0	kcal/mol	TDEq	Wilkinson, Szulejko, et al., 1992	gas phase; Reported relative to ROH..F-, 0.5 kcal/mol weaker.; B
Quantity	Value	Units	Method	Reference	Comment
rG°	22.4 ± 2.0	kcal/mol	TDEq	Wilkinson, Szulejko, et al., 1992	gas phase; Reported relative to ROH..F-, 0.5 kcal/mol weaker.; B

 +  = (  )

By formula: F^- + CH₄O = (F^-  CH₄O)