Iodine atom
- Formula: I
- Molecular weight: 126.90447
- IUPAC Standard InChI: InChI=1S/I
- IUPAC Standard InChIKey: ZCYVEMRRCGMTRW-UHFFFAOYSA-N
- CAS Registry Number: 14362-44-8
- Chemical structure:
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Gas phase ion energetics data
Go To: Top, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to I+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 10.45126 | eV | N/A | N/A | L |
| Quantity | Value | Units | Method | Reference | Comment |
| Proton affinity (review) | 608.2 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 583.5 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 3.05900 ± 0.00010 | N/A | Pelaez, Blondel, et al., 2009 | Given: 3.0590463(38) eV; B |
| 3.059036 ± 0.000044 | LPD | Hanstorp and Gustafsson, 1992 | Given: 3.059038±0.000010 eV; B |
| 3.05917 ± 0.00039 | LOG | Webster, McDermid, et al., 1983 | B |
| 3.0620 ± 0.0020 | N/A | Neiger, 1975 | B |
| 3.060 ± 0.040 | N/A | Piani, Becucci, et al., 2008 | Stated electron affinity is the Vertical Detachment Energy; B |
| 3.0630 ± 0.0030 | N/A | Berry and Reimann, 1963 | B |
| 3.34476 | N/A | Check, Faust, et al., 2001 | Fe(CO)2-(q); ; ΔS(EA)=5.0; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 10.45126 | EVAL | Lide, 1992 | LL |
| 10.43 ± 0.05 | PI | Grade and Rosinger, 1985 | LBLHLM |
| 10.4 ± 0.1 | EI | Hoareau, Cabaud, et al., 1981 | LLK |
| 10.5 | EI | Pittermann and Weil, 1980 | LLK |
| 10.45 | PE | Imre and Koenig, 1980 | LLK |
| 10.43 ± 0.02 | PE | De Leeuw, Mooyman, et al., 1978 | LLK |
| 10.451 | S | Moore, 1970 | RDSH |
| 10.45126 | S | Minnhagen, 1962 | RDSH |
Anion protonation reactions
+
=
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1315.24 ± 0.084 | kJ/mol | D-EA | Pelaez, Blondel, et al., 2009 | gas phase; Given: 3.0590463(38) eV; B |
| ΔrH° | 1312.1 | kJ/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 |
| ΔrG° | 1294.03 ± 0.25 | kJ/mol | H-TS | Pelaez, Blondel, et al., 2009 | gas phase; Given: 3.0590463(38) eV; B |
| ΔrG° | 1290.8 | kJ/mol | N/A | Check, Faust, et al., 2001 | gas phase; Fe(CO)2-(q); ; ΔS(EA)=5.0; B |
References
Go To: Top, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Pelaez, Blondel, et al., 2009
Pelaez, R.J.; Blondel, C.; Delsart, C.; Drag, C.,
Pulsed photodetachment microscopy and the electron affinity of iodine,
J. Phys. B: Atom. Mol. Opt. Phys., 2009, 42, 12, 125001, https://doi.org/10.1088/0953-4075/42/12/125001
. [all data]
Hanstorp and Gustafsson, 1992
Hanstorp, D.; Gustafsson, M.,
Determination of the Electron Affinity of Iodine,
J. Phys. B: Atom. Mol. Opt. Phys., 1992, 25, 8, 1773, https://doi.org/10.1088/0953-4075/25/8/012
. [all data]
Webster, McDermid, et al., 1983
Webster, C.R.; McDermid, I.S.; Rettner, C.T.,
Laser optogalvanic photodetachment spectroscopy: A new technique for studying photodetachment thresholds with application to I-,
J. Chem. Phys., 1983, 78, 646. [all data]
Neiger, 1975
Neiger, M.,
Quantitative Investifgation of the Radiation of the Negative Iodine Ion,
Z. Naturfor., 1975, 30, 474. [all data]
Piani, Becucci, et al., 2008
Piani, G.; Becucci, M.; Bowen, M.S.; Oakman, J.; Hu, Q.; Continetti, R.E.,
Photodetachment and dissociation dynamics of microsolvated iodide clusters,
Phys. Scripta, 2008, 78, 5, 058110, https://doi.org/10.1088/0031-8949/78/05/058110
. [all data]
Berry and Reimann, 1963
Berry, R.S.; Reimann, C.W.,
Absorption Spectrum of Gaseous Fluoride and the Electron Affinities of the Halogen Atoms,
J. Chem. Phys., 1963, 38, 7, 1540, https://doi.org/10.1063/1.1776916
. [all data]
Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S.,
Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements,
J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l
. [all data]
Lide, 1992
Lide, D.R. (Editor),
Ionization potentials of atoms and atomic ions
in Handbook of Chem. and Phys., 1992, 10-211. [all data]
Grade and Rosinger, 1985
Grade, M.; Rosinger, W.,
Correlation of electronic structures and stabilities of gaseous FeI2, Fe2I2 and Fe2I4 molecules, solid [FeI2], and iodine adsorbed on [Fe],
Surf. Sci., 1985, 156, 920. [all data]
Hoareau, Cabaud, et al., 1981
Hoareau, A.; Cabaud, B.; Melinon, P.,
Time-of-flight mass spectroscopy of supersonic beam of metallic vapours: Intensities and appearance potentials of Mx aggregates,
Surf. Sci., 1981, 106, 195. [all data]
Pittermann and Weil, 1980
Pittermann, U.; Weil, K.G.,
Massenspektrometrische Untersuchungen an Silberhalogeniden V: Verdampfung von Silberiodid,
Ber. Bunsen-Ges. Phys. Chem., 1980, 84, 542. [all data]
Imre and Koenig, 1980
Imre, D.; Koenig, T.,
The He(I) photoelectron spectrum of atomic iodine by photodissociation of molecular iodine,
Chem. Phys. Lett., 1980, 73, 62. [all data]
De Leeuw, Mooyman, et al., 1978
De Leeuw, D.M.; Mooyman, R.; De Lange, C.A.,
He(I) photoelectron spectroscopy of halogen atoms,
Chem. Phys. Lett., 1978, 54, 231. [all data]
Moore, 1970
Moore, C.E.,
Ionization potentials and ionization limits derived from the analyses of optical spectra,
Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.), 1970, 34, 1. [all data]
Minnhagen, 1962
Minnhagen, L.,
The energy levels of neutral atomic iodine,
Ark. Fys., 1962, 21, 415. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity IE (evaluated) Recommended ionization energy ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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