SO4 radical anion
- Formula: O4S-
- Molecular weight: 96.063
- CAS Registry Number: 12143-45-2
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Gas phase thermochemistry data
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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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -738. ± 22. | kJ/mol | R-EA | Wang, Nicholas, et al., 2000 | |
| ΔfH°gas | -737.6 ± 9.6 | kJ/mol | TDEq | Rudny, Sidorov, et al., 1985 | value altered from reference due to conversion from electron convention to ion convention |
Reaction thermochemistry data
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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
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Individual Reactions
O4S- + = (O4S- •
)
By formula: O4S- + H2O = (O4S- • H2O)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrG° | 24.7 ± 0.84 | kJ/mol | IMRE | Möhler, Reiner, et al., 1992 | gas phase; B |
Free energy of reaction
| ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 21. | 296. | FA | Fehsenfeld and Ferguson, 1974 | gas phase; M |
O4S- + = (O4S- •
)
By formula: O4S- + O2S = (O4S- • O2S)
Free energy of reaction
| ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 28. | 296. | FA | Fehsenfeld and Ferguson, 1974 | gas phase; switching reaction(SO4-)H2O; M |
(O4S- • 4294967295) +
= O4S-
By formula: (O4S- • 4294967295O3S) + O3S = O4S-
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 450. ± 22. | kJ/mol | N/A | Wang, Nicholas, et al., 2000 | gas phase; B |
(O4S- • ) +
= (O4S- • 2
)
By formula: (O4S- • H2O) + H2O = (O4S- • 2H2O)
Free energy of reaction
| ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 6.7 | 296. | FA | Fehsenfeld and Ferguson, 1974 | gas phase; M |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Wang, Nicholas, et al., 2000
Wang, X.B.; Nicholas, J.B.; Wang, L.S.,
Photoelectron spectroscopy and theoretical calculations of SO4- and HSO4-: Confirmation of high electron affinities of SO4 and HSO4,
J. Phys. Chem. A, 2000, 104, 3, 504-508, https://doi.org/10.1021/jp992726r
. [all data]
Rudny, Sidorov, et al., 1985
Rudny, E.B.; Sidorov, L.N.; Voyk, O.M.,
Heterolytic Dissociation of Potassium Sulfate in the Gas Phase and Heats of Formation for Trioxosulfate(1-), Tetraoxosulfate(1-), and Potassium Sulfate(KSO4-) Ions,
High Temp., 1985, 23, 238. [all data]
Möhler, Reiner, et al., 1992
Möhler, O.; Reiner, T.; Arnold, F.,
The Formation of SO5(-) by Gas Phase Ion-Molecule Reactions,
J. Chem. Phys., 1992, 97, 11, 8233, https://doi.org/10.1063/1.463394
. [all data]
Fehsenfeld and Ferguson, 1974
Fehsenfeld, F.C.; Ferguson, E.E.,
Laboratory studies of negative ion reactions with atmospheric trace constituents,
J. Chem. Phys., 1974, 61, 3181. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
T Temperature 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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