Dihydrogen disulfide
- Formula: H2S2
- Molecular weight: 66.146
- IUPAC Standard InChI: InChI=1S/H2S2/c1-2/h1-2H
- IUPAC Standard InChIKey: BWGNESOTFCXPMA-UHFFFAOYSA-N
- CAS Registry Number: 13465-07-1
- Chemical structure:
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Gas phase ion energetics 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
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
View reactions leading to H2S2+ (ion structure unspecified)
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.3 | PE | Wagner and Bock, 1974 | LLK |
| 10.01 | PE | Wagner and Bock, 1974 | Vertical value; LLK |
De-protonation reactions
HS2- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1447. ± 15. | kJ/mol | D-EA | Entfellner and Boesl, 2009 | gas phase; B |
| ΔrH° | 1448. ± 13. | kJ/mol | G+TS | Ohair, Depuy, et al., 1993 | gas phase; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1418. ± 15. | kJ/mol | H-TS | Entfellner and Boesl, 2009 | gas phase; B |
| ΔrG° | 1418. ± 13. | kJ/mol | IMRB | Ohair, Depuy, et al., 1993 | gas phase; B |
References
Go To: Top, 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.
Wagner and Bock, 1974
Wagner, G.; Bock, H.,
Photoelektronenspektren und molekuleigenschaften, XXVI. Die delokalisation von schwefel-elektronenpaaren in alkylsulfiden und -disulfiden,
Chem. Ber., 1974, 107, 68. [all data]
Entfellner and Boesl, 2009
Entfellner, M.; Boesl, U.,
Photodetachment-photoelectron spectroscopy of disulfanide: the ground and first excited electronic state of HS2 and DS2,
Phys. Chem. Chem. Phys., 2009, 11, 15, 2657-2662, https://doi.org/10.1039/b820174a
. [all data]
Ohair, Depuy, et al., 1993
Ohair, R.A.J.; Depuy, C.H.; Bierbaum, V.M.,
Gas-Phase Chemistry and Thermochemistry of the Hydroxysulfide Anion, HOS-,
J. Phys. Chem., 1993, 97, 30, 7955, https://doi.org/10.1021/j100132a026
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
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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