2-Silaisobutene


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 as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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Individual Reactions

C3H7Si- + Hydrogen cation = 2-Silaisobutene

By formula: C3H7Si- + H+ = C3H8Si

Quantity Value Units Method Reference Comment
Δr385.6 ± 5.1kcal/molG+TSDamrauer, DePuy, et al., 1986gas phase; Between H2O, MeOH; B
Quantity Value Units Method Reference Comment
Δr379.0 ± 5.0kcal/molIMRBDamrauer, DePuy, et al., 1986gas phase; Between H2O, MeOH; B

(CAS Reg. No. 54711-92-1 • 42949672952-Silaisobutene) + 2-Silaisobutene = CAS Reg. No. 54711-92-1

By formula: (CAS Reg. No. 54711-92-1 • 4294967295C3H8Si) + C3H8Si = CAS Reg. No. 54711-92-1

Quantity Value Units Method Reference Comment
Δr60.2 ± 6.1kcal/molTherDamrauer, Kass, et al., 1988gas phase; Between furan and methanol.; B

Fluorine anion + 2-Silaisobutene = (Fluorine anion • 2-Silaisobutene)

By formula: F- + C3H8Si = (F- • C3H8Si)

Quantity Value Units Method Reference Comment
Δr37. ± 2.kcal/molICRAllison and McMahon, 1990gas phase; bracketing; M

Iron ion (1+) + 2-Silaisobutene = (Iron ion (1+) • 2-Silaisobutene)

By formula: Fe+ + C3H8Si = (Fe+ • C3H8Si)

Quantity Value Units Method Reference Comment
Δr64. ± 9.kcal/molICRJacobson and Bakhtiar, 1993gas phase; M

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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

View reactions leading to C3H8Si+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Proton affinity (review)226.5kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity220.1kcal/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
7.71 ± 0.03PEDyke, Josland, et al., 1982LBLHLM
8.0PEKoenig and McKenna, 1981LLK
7.5 ± 0.3DERGusel'nikov and Nametkin, 1979LLK
7.98 ± 0.01PEDyke, Josland, et al., 1982Vertical value; LBLHLM

De-protonation reactions

C3H7Si- + Hydrogen cation = 2-Silaisobutene

By formula: C3H7Si- + H+ = C3H8Si

Quantity Value Units Method Reference Comment
Δr385.6 ± 5.1kcal/molG+TSDamrauer, DePuy, et al., 1986gas phase; Between H2O, MeOH; B
Quantity Value Units Method Reference Comment
Δr379.0 ± 5.0kcal/molIMRBDamrauer, DePuy, et al., 1986gas phase; Between H2O, MeOH; 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.

Damrauer, DePuy, et al., 1986
Damrauer, R.; DePuy, C.H.; Davidson, I.M.T.; Hughes, K.J., Gas phase ion chemistry of dimethylsilene, Organometallics, 1986, 5, 2050. [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]

Allison and McMahon, 1990
Allison, C.E.; McMahon, T.B., How Strong is the Si=C Bond in Fluoro- and Methyl Substituted Silaethylenes? An Experimental Determination of Pi Bond Strengths, J. Am. Chem. Soc., 1990, 112, 5, 1672, https://doi.org/10.1021/ja00161a002 . [all data]

Jacobson and Bakhtiar, 1993
Jacobson, D.B.; Bakhtiar, R., Generation, Characterization and Properties of Iron-Silylene and Iron-Sylene Cationic Complexes in the Gas Phase, J. Am. Chem. Soc., 1993, 115, 23, 10830, https://doi.org/10.1021/ja00076a046 . [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Dyke, Josland, et al., 1982
Dyke, J.M.; Josland, G.D.; Lewis, R.A.; Morris, A., Improved first ionization potential of the dimethylsilaethylene molecule obtained with high-temperature photoelectron spectroscopy, J. Phys. Chem., 1982, 86, 2913. [all data]

Koenig and McKenna, 1981
Koenig, T.; McKenna, W., First ionization band of 1,1-dimethylsilaethylene by transient photoelectron spectroscopy, J. Am. Chem. Soc., 1981, 103, 1212. [all data]

Gusel'nikov and Nametkin, 1979
Gusel'nikov, L.E.; Nametkin, N.S., 1,1-dimethyl-1-silaethylene. Heat of formation, ionization potential and the energy of the silicon-carbon π-bond, J. Organomet. Chem., 1979, 169, 155. [all data]


Notes

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