Oxygen anion
- Formula: O2-
- Molecular weight: 31.9993
- IUPAC Standard InChI: InChI=1S/HO2/c1-2/h1H/p-1
- IUPAC Standard InChIKey: OUUQCZGPVNCOIJ-UHFFFAOYSA-M
- CAS Registry Number: 11062-77-4
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, 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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -43.22 ± 0.59 | kJ/mol | R-EA | Ervin, Anusiewicz, et al., 2003 | B |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 209.59 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1977 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry 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
+
=
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1476.9 ± 3.0 | kJ/mol | D-EA | Travers, Cowles, et al., 1989 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1450.5 ± 3.4 | kJ/mol | H-TS | Travers, Cowles, et al., 1989 | gas phase |
References
Go To: Top, Gas phase thermochemistry data, 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.
Ervin, Anusiewicz, et al., 2003
Ervin, K.M.; Anusiewicz, W.; Skurski, P.; Simons, J.; Lineberger, W.C.,
The only stable state of O-2(-) is the X (2)Pi(g) ground state and it (still!) has an adiabatic electron detachment energy of,
J. Phys. Chem. A, 2003, 107, 41, 8521-8529, https://doi.org/10.1021/jp0357323
. [all data]
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Travers, Cowles, et al., 1989
Travers, M.J.; Cowles, D.C.; Ellison, G.B.,
Reinvestigation of the Electron Affinities of O2 and NO,
Chem. Phys. Lett., 1989, 164, 5, 449, https://doi.org/10.1016/0009-2614(89)85237-6
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions 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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