MeSiH2 anion
- Formula: CH5Si-
- Molecular weight: 45.1364
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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
Electron affinity of neutral species
| EAneutral (eV) | Method | Reference | Comment |
|---|---|---|---|
| 1.193 ± 0.035 | LPD | Wetzel, Salomon, et al., 1989 |
Protonation reactions
CH5Si- + =
By formula: CH5Si- + H+ = CH6Si
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1579. ± 8.8 | kJ/mol | G+TS | Gal, Decouzon, et al., 2001 | gas phase |
| ΔrH° | 1582. ± 13. | kJ/mol | D-EA | Wetzel, Salomon, et al., 1989 | gas phase |
| ΔrH° | 1582. ± 8.8 | kJ/mol | G+TS | Wetzel, Salomon, et al., 1989 | gas phase; 0.8 kcal/mol weaker than iPrOH; value altered from reference due to change in acidity scale |
| ΔrH° | 1613. ± 17. | kJ/mol | G+TS | Damrauer, Kass, et al., 1988 | gas phase; Between furan and methanol. |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1544. ± 8.4 | kJ/mol | IMRE | Gal, Decouzon, et al., 2001 | gas phase |
| ΔrG° | 1546. ± 13. | kJ/mol | H-TS | Wetzel, Salomon, et al., 1989 | gas phase |
| ΔrG° | 1546. ± 8.4 | kJ/mol | IMRE | Wetzel, Salomon, et al., 1989 | gas phase; 0.8 kcal/mol weaker than iPrOH; value altered from reference due to change in acidity scale |
| ΔrG° | 1577. ± 17. | kJ/mol | IMRB | Damrauer, Kass, et al., 1988 | gas phase; Between furan and methanol. |
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.
Wetzel, Salomon, et al., 1989
Wetzel, D.M.; Salomon, K.E.; Berger, S.; Brauman, J.I.,
Gas-Phase Acidities of Organosilanes and Electron Affinities of Organosilyl Radicals,
J. Am. Chem. Soc., 1989, 111, 11, 3835, https://doi.org/10.1021/ja00193a013
. [all data]
Gal, Decouzon, et al., 2001
Gal, J.F.; Decouzon, M.; Maria, P.C.; Gonzalez, A.I.; Mo, O.; Yanez, M.; El Chaouch, S.; Guillemin, J.C.,
Acidity trends in alpha,beta-unsaturated alkanes, silanes, germanes, and stannanes,
J. Am. Chem. Soc., 2001, 123, 26, 6353-6359, https://doi.org/10.1021/ja004079j
. [all data]
Damrauer, Kass, et al., 1988
Damrauer, R.; Kass, S.R.; DePuy, C.H.,
Gas-Phase Acidities of Methylsilanes: C-H versus Si-H,
Organomet., 1988, 7, 3, 637, https://doi.org/10.1021/om00093a011
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
EAneutral Electron affinity of neutral species 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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