(Me3Si)3Si anion
- Formula: C9H27Si4-
- Molecular weight: 247.6532
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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
C9H27Si4- + =
By formula: C9H27Si4- + H+ = C9H28Si4
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 350.8 ± 2.8 | kcal/mol | D-EA | Brinkman, Berger, et al., 1994 | gas phase; DH revised: Laarhoven, Mulder, et al., 1999 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 343.0 ± 2.9 | kcal/mol | H-TS | Brinkman, Berger, et al., 1994 | gas phase; DH revised: Laarhoven, Mulder, et al., 1999 |
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
Electron affinity of neutral species
| EAneutral (eV) | Method | Reference | Comment |
|---|---|---|---|
| 2.029 ± 0.087 | LPD | Brinkman, Berger, et al., 1994 | DH revised: Laarhoven, Mulder, et al., 1999 |
Protonation reactions
C9H27Si4- + =
By formula: C9H27Si4- + H+ = C9H28Si4
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 350.8 ± 2.8 | kcal/mol | D-EA | Brinkman, Berger, et al., 1994 | gas phase; DH revised: Laarhoven, Mulder, et al., 1999 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 343.0 ± 2.9 | kcal/mol | H-TS | Brinkman, Berger, et al., 1994 | gas phase; DH revised: Laarhoven, Mulder, et al., 1999 |
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.
Brinkman, Berger, et al., 1994
Brinkman, E.A.; Berger, S.; Brauman, J.I.,
alpha-Silyl-substituent stabilization of carbanions and silyl anions,
J. Am. Chem. Soc., 1994, 116, 18, 8304, https://doi.org/10.1021/ja00097a042
. [all data]
Laarhoven, Mulder, et al., 1999
Laarhoven, L.J.J.; Mulder, P.; Wayner, D.D.M.,
Determination of bond dissociation enthalpies in solution by photoacoustic calorimetry,
Acc. Chem. Res., 1999, 32, 4, 342-349, https://doi.org/10.1021/ar9703443
. [all data]
Notes
Go To: Top, Reaction thermochemistry data, 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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