Methyl mercaptan, protonated
- Formula: CH5S+
- Molecular weight: 49.115
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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 by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias
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Individual Reactions
CH5S+ + = (CH5S+ •
)
By formula: CH5S+ + H2O = (CH5S+ • H2O)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 15.5 | kcal/mol | PHPMS | Meot-Ner (Mautner) and Sieck, 1985 | gas phase; Entropy change calculated or estimated |
| ΔrH° | 13.5 | kcal/mol | ICR | Berman and Beauchamp, 1986 | gas phase; bracketing; Lias, Liebman, et al., 1984 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 22. | cal/mol*K | N/A | Meot-Ner (Mautner) and Sieck, 1985 | gas phase; Entropy change calculated or estimated |
Free energy of reaction
| ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 5.2 | 476. | PHPMS | Meot-Ner (Mautner) and Sieck, 1985 | gas phase; Entropy change calculated or estimated |
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.
Meot-Ner (Mautner) and Sieck, 1985
Meot-Ner (Mautner), M.; Sieck, L.W.,
The Ionic Hydrogen Bond and Ion Solvation. 4. SH+ O and NH+ S Bonds. Correlations with Proton Affinity. Mutual Effects of Weak and Strong Ligands in Mixed Clusters,
J. Phys. Chem., 1985, 89, 24, 5222, https://doi.org/10.1021/j100270a021
. [all data]
Berman and Beauchamp, 1986
Berman, D.W.; Beauchamp, J.L.,
Quoted in Keesee and Castleman, 1986, 1986. [all data]
Lias, Liebman, et al., 1984
Lias, S.G.; Liebman, J.F.; Levin, R.D.,
Evaluated gas phase basicities and proton affinities of molecules heats of formation of protonated molecules,
J. Phys. Chem. Ref. Data, 1984, 13, 695. [all data]
Keesee and Castleman, 1986
Keesee, R.G.; Castleman, A.W., Jr.,
Thermochemical data on Ggs-phase ion-molecule association and clustering reactions,
J. Phys. Chem. Ref. Data, 1986, 15, 1011. [all data]
Notes
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
T Temperature ΔrG° Free energy of reaction at standard conditions 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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