SO4 radical anion
- Formula: O4S-
- Molecular weight: 96.063
- CAS Registry Number: 12143-45-2
- Information on this page:
- Other data available:
- Options:
Gas phase thermochemistry data
Go To: Top, Reaction 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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -176.3 ± 5.2 | kcal/mol | R-EA | Wang, Nicholas, et al., 2000 | |
| ΔfH°gas | -176.3 ± 2.3 | kcal/mol | TDEq | Rudny, Sidorov, et al., 1985 | value altered from reference due to conversion from electron convention to ion convention |
Reaction thermochemistry 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 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.
Individual Reactions
O4S- + = (O4S- •
)
By formula: O4S- + H2O = (O4S- • H2O)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrG° | 5.90 ± 0.20 | kcal/mol | IMRE | Möhler, Reiner, et al., 1992 | gas phase; B |
Free energy of reaction
| ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 5.1 | 296. | FA | Fehsenfeld and Ferguson, 1974 | gas phase; M |
O4S- + = (O4S- •
)
By formula: O4S- + O2S = (O4S- • O2S)
Free energy of reaction
| ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 6.7 | 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° | 107.6 ± 5.2 | kcal/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° (kcal/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 1.6 | 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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.