Si2H5 anion
- Formula: H5Si2-
- Molecular weight: 61.2112
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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 by: John E. Bartmess
Protonation reactions
H5Si2- + =
By formula: H5Si2- + H+ = H6Si2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | <313.5 ± 2.8 | kcal/mol | Acid | Krishnakumar and Srivastava, 1991 | gas phase; From Si2H6, AP = 0.0 eV/Data for SiH4 plus a-Si effects imply ΔHacid ca. 360. G3MP2B3 calculations give dHacid=360 kcal/mol |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | <304.7 ± 3.4 | kcal/mol | H-TS | Krishnakumar and Srivastava, 1991 | gas phase; From Si2H6, AP = 0.0 eV/Data for SiH4 plus a-Si effects imply ΔHacid ca. 360. G3MP2B3 calculations give dHacid=360 kcal/mol |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Krishnakumar and Srivastava, 1991
Krishnakumar, E.; Srivastava, S.K.,
Dissociative Electron Attachment of Electrons with Si2H6,
Int. J. Mass Spectrom. Ion Proc., 1991, 103, 2-3, 107, https://doi.org/10.1016/0168-1176(91)80082-X
. [all data]
Notes
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- 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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