Silane, methyl-
- Formula: CH6Si
- Molecular weight: 46.1438
- IUPAC Standard InChIKey: UIUXUFNYAYAMOE-UHFFFAOYSA-N
- CAS Registry Number: 992-94-9
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Methylsilane; Silaethane; CH3SiH3
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics 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
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
CH5Si- + =
By formula: CH5Si- + H+ = CH6Si
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 377.4 ± 2.1 | kcal/mol | G+TS | Gal, Decouzon, et al., 2001 | gas phase |
ΔrH° | 378.0 ± 3.0 | kcal/mol | D-EA | Wetzel, Salomon, et al., 1989 | gas phase |
ΔrH° | 378.0 ± 2.1 | kcal/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° | 385.4 ± 4.1 | kcal/mol | G+TS | Damrauer, Kass, et al., 1988 | gas phase; Between furan and methanol. |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 369.0 ± 2.0 | kcal/mol | IMRE | Gal, Decouzon, et al., 2001 | gas phase |
ΔrG° | 369.6 ± 3.1 | kcal/mol | H-TS | Wetzel, Salomon, et al., 1989 | gas phase |
ΔrG° | 369.6 ± 2.0 | kcal/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° | 377.0 ± 4.0 | kcal/mol | IMRB | Damrauer, Kass, et al., 1988 | gas phase; Between furan and methanol. |
CH5Si- + =
By formula: CH5Si- + H+ = CH6Si
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 388.4 ± 4.1 | kcal/mol | G+TS | Damrauer, Kass, et al., 1988 | gas phase; Slightly less acidic then fluorobenzene |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 380.0 ± 4.0 | kcal/mol | IMRB | Damrauer, Kass, et al., 1988 | gas phase; Slightly less acidic then fluorobenzene |
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 as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.7 | PE | Potzinger, Ritter, et al., 1975 | LLK |
11.6 | PE | Roberge, Sandorfy, et al., 1978 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH3+ | 15.1 ± 0.3 | ? | EI | Steele, Nichols, et al., 1962 | RDSH |
CH3Si+ | 12.8 | ? | EI | Bradshaw, Moyes, et al., 1976 | LLK |
CH3Si+ | 14.05 ± 0.05 | H2+H | EI | Potzinger and Lampe, 1970 | RDSH |
CH4Si+ | 11.3 | ? | EI | Bradshaw, Moyes, et al., 1976 | LLK |
CH4Si+ | 11.4 ± 0.1 | H2 | EI | Potzinger, Ritter, et al., 1975 | LLK |
CH4Si+ | 11.45 ± 0.05 | H2 | EI | Potzinger and Lampe, 1970 | RDSH |
CH5Si+ | 11.8 | H | EI | Bradshaw, Moyes, et al., 1976 | LLK |
CH5Si+ | 11.8 ± 0.1 | H | EI | Potzinger, Ritter, et al., 1975 | LLK |
CH5Si+ | 11.80 ± 0.05 | H | EI | Potzinger and Lampe, 1970 | RDSH |
HSi+ | 14.8 | ? | EI | Bradshaw, Moyes, et al., 1976 | LLK |
H2Si+ | 11.7 | CH4 | EI | Bradshaw, Moyes, et al., 1976 | LLK |
H2Si+ | 11.5 ± 0.1 | CH4 | EI | Potzinger, Ritter, et al., 1975 | LLK |
SiH2+ | 11.50 ± 0.05 | CH4 | EI | Potzinger and Lampe, 1970 | RDSH |
SiH2+ | 11.6 ± 0.1 | CH4 | EI | Steele, Nichols, et al., 1962 | RDSH |
H3Si+ | 12.5 | ? | EI | Bradshaw, Moyes, et al., 1976 | LLK |
SiH3+ | 12.8 ± 0.1 | CH3 | EI | Steele, Nichols, et al., 1962 | RDSH |
Si+ | 12.1 | ? | EI | Bradshaw, Moyes, et al., 1976 | LLK |
De-protonation reactions
CH5Si- + =
By formula: CH5Si- + H+ = CH6Si
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 377.4 ± 2.1 | kcal/mol | G+TS | Gal, Decouzon, et al., 2001 | gas phase; B |
ΔrH° | 378.0 ± 3.0 | kcal/mol | D-EA | Wetzel, Salomon, et al., 1989 | gas phase; B |
ΔrH° | 378.0 ± 2.1 | kcal/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; B |
ΔrH° | 385.4 ± 4.1 | kcal/mol | G+TS | Damrauer, Kass, et al., 1988 | gas phase; Between furan and methanol.; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 369.0 ± 2.0 | kcal/mol | IMRE | Gal, Decouzon, et al., 2001 | gas phase; B |
ΔrG° | 369.6 ± 3.1 | kcal/mol | H-TS | Wetzel, Salomon, et al., 1989 | gas phase; B |
ΔrG° | 369.6 ± 2.0 | kcal/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; B |
ΔrG° | 377.0 ± 4.0 | kcal/mol | IMRB | Damrauer, Kass, et al., 1988 | gas phase; Between furan and methanol.; B |
CH5Si- + =
By formula: CH5Si- + H+ = CH6Si
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 388.4 ± 4.1 | kcal/mol | G+TS | Damrauer, Kass, et al., 1988 | gas phase; Slightly less acidic then fluorobenzene; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 380.0 ± 4.0 | kcal/mol | IMRB | Damrauer, Kass, et al., 1988 | gas phase; Slightly less acidic then fluorobenzene; B |
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.
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]
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]
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]
Potzinger, Ritter, et al., 1975
Potzinger, P.; Ritter, A.; Krause, J.,
Massenspektrometrische Bestimmung von Bindungsenergien in siliciumorganischen Verbindungen,
Z. Naturforsch. A:, 1975, 30, 347. [all data]
Roberge, Sandorfy, et al., 1978
Roberge, R.; Sandorfy, C.; Matthews, J.I.; Strausz, O.P.,
The far ultraviolet HeI photoelectron spectra of alkyl and fluorine substituted silane derivatives,
J. Chem. Phys., 1978, 69, 5105. [all data]
Steele, Nichols, et al., 1962
Steele, W.C.; Nichols, L.D.; Stone, F.G.A.,
The determination of silicon-carbon and silicon-hydrogen bond dissociation energies by electron impact,
J. Am. Chem. Soc., 1962, 84, 4441. [all data]
Bradshaw, Moyes, et al., 1976
Bradshaw, D.I.; Moyes, R.B.; Wells, P.B.,
Mass spectra of some deuterium-labelled methylsilanes the analysis of mixtures,
Can. J. Chem., 1976, 54, 599. [all data]
Potzinger and Lampe, 1970
Potzinger, P.; Lampe, F.W.,
Ionic reactions in gaseous methylsilane,
J. Phys. Chem., 1970, 74, 587. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy 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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