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Silane, methyl-


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 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
10.7PEPotzinger, Ritter, et al., 1975LLK
11.6PERoberge, Sandorfy, et al., 1978Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CH3+15.1 ± 0.3?EISteele, Nichols, et al., 1962RDSH
CH3Si+12.8?EIBradshaw, Moyes, et al., 1976LLK
CH3Si+14.05 ± 0.05H2+HEIPotzinger and Lampe, 1970RDSH
CH4Si+11.3?EIBradshaw, Moyes, et al., 1976LLK
CH4Si+11.4 ± 0.1H2EIPotzinger, Ritter, et al., 1975LLK
CH4Si+11.45 ± 0.05H2EIPotzinger and Lampe, 1970RDSH
CH5Si+11.8HEIBradshaw, Moyes, et al., 1976LLK
CH5Si+11.8 ± 0.1HEIPotzinger, Ritter, et al., 1975LLK
CH5Si+11.80 ± 0.05HEIPotzinger and Lampe, 1970RDSH
HSi+14.8?EIBradshaw, Moyes, et al., 1976LLK
H2Si+11.7CH4EIBradshaw, Moyes, et al., 1976LLK
H2Si+11.5 ± 0.1CH4EIPotzinger, Ritter, et al., 1975LLK
SiH2+11.50 ± 0.05CH4EIPotzinger and Lampe, 1970RDSH
SiH2+11.6 ± 0.1CH4EISteele, Nichols, et al., 1962RDSH
H3Si+12.5?EIBradshaw, Moyes, et al., 1976LLK
SiH3+12.8 ± 0.1CH3EISteele, Nichols, et al., 1962RDSH
Si+12.1?EIBradshaw, Moyes, et al., 1976LLK

De-protonation reactions

CH5Si- + Hydrogen cation = Silane, methyl-

By formula: CH5Si- + H+ = CH6Si

Quantity Value Units Method Reference Comment
Deltar377.4 ± 2.1kcal/molG+TSGal, Decouzon, et al., 2001gas phase; B
Deltar378.0 ± 3.0kcal/molD-EAWetzel, Salomon, et al., 1989gas phase; B
Deltar378.0 ± 2.1kcal/molG+TSWetzel, Salomon, et al., 1989gas phase; 0.8 kcal/mol weaker than iPrOH; value altered from reference due to change in acidity scale; B
Deltar385.4 ± 4.1kcal/molG+TSDamrauer, Kass, et al., 1988gas phase; Between furan and methanol.; B
Quantity Value Units Method Reference Comment
Deltar369.0 ± 2.0kcal/molIMREGal, Decouzon, et al., 2001gas phase; B
Deltar369.6 ± 3.1kcal/molH-TSWetzel, Salomon, et al., 1989gas phase; B
Deltar369.6 ± 2.0kcal/molIMREWetzel, Salomon, et al., 1989gas phase; 0.8 kcal/mol weaker than iPrOH; value altered from reference due to change in acidity scale; B
Deltar377.0 ± 4.0kcal/molIMRBDamrauer, Kass, et al., 1988gas phase; Between furan and methanol.; B

CH5Si- + Hydrogen cation = Silane, methyl-

By formula: CH5Si- + H+ = CH6Si

Quantity Value Units Method Reference Comment
Deltar388.4 ± 4.1kcal/molG+TSDamrauer, Kass, et al., 1988gas phase; Slightly less acidic then fluorobenzene; B
Quantity Value Units Method Reference Comment
Deltar380.0 ± 4.0kcal/molIMRBDamrauer, Kass, et al., 1988gas phase; Slightly less acidic then fluorobenzene; B

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.

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]

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]


Notes

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