Si2H5 anion
- Formula: H5Si2-
- Molecular weight: 61.2112
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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: John E. Bartmess
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Individual 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 |
Gas phase ion energetics 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
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
Go To: Top, Reaction thermochemistry data, 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.
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
Go To: Top, Reaction thermochemistry data, 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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