Sulfur dimer, positive ion
- Formula: S2+
- Molecular weight: 64.129
- CAS Registry Number: 12597-02-3
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Reaction thermochemistry 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 compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias
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Individual Reactions
S2+ + = (S2+ •
)
By formula: S2+ + CS2 = (S2+ • CS2)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 30.9 | kcal/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase |
| ΔrH° | 28.8 | kcal/mol | PI | Ono, Linn, et al., 1981 | gas phase |
| ΔrH° | 21.9 | kcal/mol | PHPMS | Meot-Ner (Mautner) and Field, 1977 | gas phase; equilibrium uncertain |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 25. | cal/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase |
| ΔrS° | 17.1 | cal/mol*K | PHPMS | Meot-Ner (Mautner) and Field, 1977 | gas phase; equilibrium uncertain |
(S2+ • 2) +
= (S2+ • 3
)
By formula: (S2+ • 2CS2) + CS2 = (S2+ • 3CS2)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 5.5 | kcal/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase; Entropy change calculated or estimated |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 17. | cal/mol*K | N/A | Hiraoka, Fujimaki, et al., 1994 | gas phase; Entropy change calculated or estimated |
(S2+ • ) +
= (S2+ • 2
)
By formula: (S2+ • CS2) + CS2 = (S2+ • 2CS2)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 8.3 | kcal/mol | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 23. | cal/mol*K | PHPMS | Hiraoka, Fujimaki, et al., 1994 | gas phase |
References
Go To: Top, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hiraoka, Fujimaki, et al., 1994
Hiraoka, K.; Fujimaki, S.; Aruga, K.; Yamabe, S.,
Frontier-Controlled Structures of the Gas-Phase A+-(CS2)n Clusters ,A+- = S2+, CS2+, S2-, and CS2-,
J. Phys. Chem., 1994, 98, 7, 1802, https://doi.org/10.1021/j100058a014
. [all data]
Ono, Linn, et al., 1981
Ono, Y.; Linn, S.H.; Prest, H.F.; Gress, M.E.; Ng, C.Y.,
A Study of the High Rydberg State and Ion - Molecule Reactions of Carbon Disulfide Using the Molecular Beam Photoionization Method,
J. Chem. Phys., 1981, 74, 2, 1125, https://doi.org/10.1063/1.441219
. [all data]
Meot-Ner (Mautner) and Field, 1977
Meot-Ner (Mautner), M.; Field, F.H.,
Proton Affinity and Ion - Molecule Clustering in CO2 and CS2. Applications in Martian Ionospheric Chemistry,
J. Chem. Phys., 1977, 66, 10, 4527, https://doi.org/10.1063/1.433706
. [all data]
Notes
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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