Silane, methyl-


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

CH5Si- + Hydrogen cation = Silane, methyl-

By formula: CH5Si- + H+ = CH6Si

Quantity Value Units Method Reference Comment
Δr1579. ± 8.8kJ/molG+TSGal, Decouzon, et al., 2001gas phase
Δr1582. ± 13.kJ/molD-EAWetzel, Salomon, et al., 1989gas phase
Δr1582. ± 8.8kJ/molG+TSWetzel, Salomon, et al., 1989gas phase; 0.8 kcal/mol weaker than iPrOH; value altered from reference due to change in acidity scale
Δr1613. ± 17.kJ/molG+TSDamrauer, Kass, et al., 1988gas phase; Between furan and methanol.
Quantity Value Units Method Reference Comment
Δr1544. ± 8.4kJ/molIMREGal, Decouzon, et al., 2001gas phase
Δr1546. ± 13.kJ/molH-TSWetzel, Salomon, et al., 1989gas phase
Δr1546. ± 8.4kJ/molIMREWetzel, Salomon, et al., 1989gas phase; 0.8 kcal/mol weaker than iPrOH; value altered from reference due to change in acidity scale
Δr1577. ± 17.kJ/molIMRBDamrauer, Kass, et al., 1988gas phase; Between furan and methanol.

CH5Si- + Hydrogen cation = Silane, methyl-

By formula: CH5Si- + H+ = CH6Si

Quantity Value Units Method Reference Comment
Δr1625. ± 17.kJ/molG+TSDamrauer, Kass, et al., 1988gas phase; Slightly less acidic then fluorobenzene
Quantity Value Units Method Reference Comment
Δr1590. ± 17.kJ/molIMRBDamrauer, Kass, et al., 1988gas phase; Slightly less acidic then fluorobenzene

Vibrational and/or electronic energy levels

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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: Takehiko Shimanouchi

Symmetry:   C     Symmetry Number σ = 3


 Sym.   No   Approximate   Selected Freq.  Infrared   Raman   Comments 
 Species   type of mode   Value   Rating   Value  Phase  Value  Phase

a1 1 CH3 s-str 2898  E 2928.8 M gas FR25)
a1 1 CH3 s-str 2898  E 2867.4 M gas
a1 2 SiH3 s-str 2169  C 2169 S gas
a1 3 CH3 s-deform 1260  C 1260 M gas
a1 4 SiH3 s-deform 940  C 940 VS gas
a1 5 Csi str 700  C 700 S gas
a2 6 Torsion 187  D  ia ν187.6νA). MW. ν186.9νE)
e 7 CH3 d-str 2982  A 2981.6 M gas
e 8 SiH3 d-str 2166  A 2965.7 S gas
e 9 CH3 d-deform 1403  C 1403 M gas
e 10 SiH3 d-deform 980  D 980 gas The band origin is not determined clearly
e 11 CH3 rock 868  B 867.5 S gas
e 12 SiH3 rock 540  C 540 M gas

Source: Shimanouchi, 1972

Notes

VSVery strong
SStrong
MMedium
iaInactive
FRFermi resonance with an overtone or a combination tone indicated in the parentheses.
MWTorsional Frequency calculated from microwave spectroscopic data.
A0~1 cm-1 uncertainty
B1~3 cm-1 uncertainty
C3~6 cm-1 uncertainty
D6~15 cm-1 uncertainty
E15~30 cm-1 uncertainty

References

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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]

Shimanouchi, 1972
Shimanouchi, T., Tables of Molecular Vibrational Frequencies Consolidated Volume II, J. Phys. Chem. Ref. Data, 1972, 6, 3, 993-1102. [all data]


Notes

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