Silane, tetramethyl-

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Gas phase 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.

Quantity Value Units Method Reference Comment
Δfgas-68.499kcal/molReviewChase, 1998Data last reviewed in December, 1960
Quantity Value Units Method Reference Comment
gas,1 bar86.310cal/mol*KReviewChase, 1998Data last reviewed in December, 1960

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 1500.
A 9.301401
B 94.97971
C -45.25120
D 8.334850
E -0.064165
F -75.33191
G 70.82500
H -68.50010
ReferenceChase, 1998
Comment Data last reviewed in December, 1960

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

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

C4H11Si- + Hydrogen cation = Silane, tetramethyl-

By formula: C4H11Si- + H+ = C4H12Si

Quantity Value Units Method Reference Comment
Δr388.2 ± 3.1kcal/molG+TSDamrauer, Kass, et al., 1988gas phase; Comparable to fluorobenzene; B
Δr390.9 ± 2.0kcal/molD-EAWetzel and Brauman, 1988gas phase; B
Quantity Value Units Method Reference Comment
Δr379.0 ± 3.0kcal/molIMRBDamrauer, Kass, et al., 1988gas phase; Comparable to fluorobenzene; B
Δr381.7 ± 2.1kcal/molH-TSWetzel and Brauman, 1988gas phase; B
Δr390.7 ± 5.0kcal/molIMRBDePuy and Damrauer, 1984gas phase; B

Fluorine anion + Silane, tetramethyl- = (Fluorine anion • Silane, tetramethyl-)

By formula: F- + C4H12Si = (F- • C4H12Si)

Quantity Value Units Method Reference Comment
Δr29.9 ± 2.0kcal/molIMRELarson and McMahon, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
Δr21.cal/mol*KN/ALarson and McMahon, 1985gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity Value Units Method Reference Comment
Δr23.6 ± 2.0kcal/molIMRELarson and McMahon, 1985gas phase; B,M

C3H9Si+ + Silane, tetramethyl- = (C3H9Si+ • Silane, tetramethyl-)

By formula: C3H9Si+ + C4H12Si = (C3H9Si+ • C4H12Si)

Quantity Value Units Method Reference Comment
Δr22.3kcal/molPHPMSWojtyniak, Li, et al., 1987gas phase; M
Quantity Value Units Method Reference Comment
Δr35.2cal/mol*KPHPMSWojtyniak, Li, et al., 1987gas phase; M

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 evaluated as indicated in comments:
L - Sharon G. Lias

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
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard

Quantity Value Units Method Reference Comment
IE (evaluated)9.80 ± 0.04eVN/AN/AL

Ionization energy determinations

IE (eV) Method Reference Comment
9.80 ± 0.03PIMurphy and Beauchamp, 1977LLK
9.6PEPotzinger, Ritter, et al., 1975LLK
9.99 ± 0.03EIMacLean and Sacher, 1974LLK
9.79 ± 0.04PEJonas, Schweitzer, et al., 1973LLK
9.4 ± 0.1PEEvans, Green, et al., 1972LLK
9.85 ± 0.16EILappert, Pedley, et al., 1971LLK
9.74 ± 0.05EIPotzinger and Lampe, 1970RDSH
9.86 ± 0.02PIDistefano, 1970RDSH
9.85 ± 0.16EILappert, Simpson, et al., 1969RDSH
9.9 ± 0.1EIBand, Davidson, et al., 1968RDSH
9.98 ± 0.03EIHess, Lampe, et al., 1965RDSH
10.29PEKhvostenko, Zykov, et al., 1981Vertical value; LLK
10.4PERoberge, Sandorfy, et al., 1978Vertical value; LLK
10.57PEStarzewski, Richter, et al., 1976Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CH3Si+17.3?EIdeRidder and Dijkstra, 1967RDSH
CH3Si+17.1 ± 0.4?EIHobrock and Kiser, 1961RDSH
CH4Si+16.3?EIdeRidder and Dijkstra, 1967RDSH
CH5Si+13.81 ± 0.02C2H4+CH3PIDistefano, 1970RDSH
CH5Si+14.4C2H4+CH3EIdeRidder and Dijkstra, 1967RDSH
C2H6Si+13.4?EIdeRidder and Dijkstra, 1967RDSH
C2H6Si+13.9 ± 0.3?EIHobrock and Kiser, 1961RDSH
C2H7Si+13.3?EIdeRidder and Dijkstra, 1967RDSH
C3H9Si+10.09 ± 0.01CH3PIPECOSzepes and Baer, 1984T = 298K; LBLHLM
C3H9Si+10.28 ± 0.01CH3PIPECOSzepes and Baer, 1984T = 0K; LBLHLM
C3H9Si+10.28 ± 0.01CH3PIPECOSzepes and Baer, 1984, 2T = 0K; LBLHLM
C3H9Si+10.03 ± 0.04CH3PIMurphy and Beauchamp, 1977LLK
C3H9Si+10.3 ± 0.1CH3EIPotzinger, Ritter, et al., 1975LLK
C3H9Si+10.63 ± 0.05CH3EIMacLean and Sacher, 1974LLK
C3H9Si+10.53 ± 0.20CH3EILappert, Pedley, et al., 1971LLK
C3H9Si+10.25 ± 0.05CH3EIPotzinger and Lampe, 1970RDSH
C3H9Si+10.09 ± 0.02CH3PIDistefano, 1970RDSH
C3H9Si+10.53 ± 0.20CH3EILappert, Simpson, et al., 1969RDSH
C3H9Si+10.4 ± 0.1CH3EIBand, Davidson, et al., Commun. 1967RDSH
C3H9Si+10.5 ± 0.1CH3EIConnor, Finney, et al., 1966RDSH
C3H9Si+10.63 ± 0.13CH3EIHess, Lampe, et al., 1964RDSH
SiH+18.2?EIdeRidder and Dijkstra, 1967RDSH
SiH3+16.5?EIdeRidder and Dijkstra, 1967RDSH
Si+17.9?EIdeRidder and Dijkstra, 1967RDSH

De-protonation reactions

C4H11Si- + Hydrogen cation = Silane, tetramethyl-

By formula: C4H11Si- + H+ = C4H12Si

Quantity Value Units Method Reference Comment
Δr388.2 ± 3.1kcal/molG+TSDamrauer, Kass, et al., 1988gas phase; Comparable to fluorobenzene; B
Δr390.9 ± 2.0kcal/molD-EAWetzel and Brauman, 1988gas phase; B
Quantity Value Units Method Reference Comment
Δr379.0 ± 3.0kcal/molIMRBDamrauer, Kass, et al., 1988gas phase; Comparable to fluorobenzene; B
Δr381.7 ± 2.1kcal/molH-TSWetzel and Brauman, 1988gas phase; B
Δr390.7 ± 5.0kcal/molIMRBDePuy and Damrauer, 1984gas phase; B

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director


Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin R.W.CRAWFORD UNIV. OF CALIFORNIA, LIVERMORE, CALIFORNIA, USA
NIST MS number 19500

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UV/Visible spectrum

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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: Victor Talrose, Alexander N. Yermakov, Alexy A. Usov, Antonina A. Goncharova, Axlexander N. Leskin, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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UVVis spectrum
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Additional Data

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Source Bastian, et al., 1980
Owner INEP CP RAS, NIST OSRD
Collection (C) 2007 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS
Source reference RAS UV No. 18490
Instrument unknown

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [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]

Wetzel and Brauman, 1988
Wetzel, D.M.; Brauman, J.I., Quantitative Measure of alpha-Silyl Carbanion Stabilization. The Electron Affinity of (Trimethylsilyl)methyl Radical, J. Am. Chem. Soc., 1988, 110, 25, 8333, https://doi.org/10.1021/ja00233a008 . [all data]

DePuy and Damrauer, 1984
DePuy, C.H.; Damrauer, R., Reactions of organosilane anionic species with nitrous oxide, Organometallics, 1984, 3, 362. [all data]

Larson and McMahon, 1985
Larson, J.W.; McMahon, T.B., Fluoride and chloride affinities of the main group oxides, fluorides, oxofluorides, and alkyls. Quantitative scales of lewis acidities from ICR halide exchange equilibria, J. Am. Chem. Soc., 1985, 107, 766. [all data]

Arshadi, Yamdagni, et al., 1970
Arshadi, M.; Yamdagni, R.; Kebarle, P., Hydration of Halide Negative Ions in the Gas Phase. II. Comparison of Hydration Energies for the Alkali Positive and Halide Negative Ions, J. Phys. Chem., 1970, 74, 7, 1475, https://doi.org/10.1021/j100702a014 . [all data]

Wojtyniak, Li, et al., 1987
Wojtyniak, A.C.M.; Li, K.; Stone, J.A., The Formation of (CH3)7Si2+ in (CH3)4Si/CH4 Mixtures and CH3- Exchange Reactions Between (CH3)4Si, (CH3)4Ge and (CH3)4Sn Studied by High Pressure Mass Spectrometry, Can. J. Chem., 1987, 65, 12, 2849, https://doi.org/10.1139/v87-473 . [all data]

Murphy and Beauchamp, 1977
Murphy, M.K.; Beauchamp, J.L., Photoionization mass spectrometry of the fluoromethylsilanes (CH3)n F4-nSi (n = 1-4), J. Am. Chem. Soc., 1977, 99, 2085. [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]

MacLean and Sacher, 1974
MacLean, D.I.; Sacher, R.E., A study of some spectroscopic properties of Group IVA acetylides, J. Organomet. Chem., 1974, 74, 197. [all data]

Jonas, Schweitzer, et al., 1973
Jonas, A.E.; Schweitzer, G.K.; Grimm, F.A.; Carlson, T.A., The photoelectron spectra of the tetrafluoro and tetramethyl compounds of the group IV elements, J. Electron Spectrosc. Relat. Phenom., 1973, 1, 29. [all data]

Evans, Green, et al., 1972
Evans, S.; Green, J.C.; Joachim, P.J.; Orchard, A.F.; Turner, D.W.; Maier, J.P., Electronic structures of the Group IVB tetramethyls by helium-(I) photoelectron spectroscopy, J. Chem. Soc. Faraday Trans. 2, 1972, 68, 905. [all data]

Lappert, Pedley, et al., 1971
Lappert, M.F.; Pedley, J.B.; Simpson, J.; Spalding, T.R., Bonding studies of compounds of boron and the Group IV elements. VI. Mass spectrometric studies on compounds Me4M and Me3M-M'Me3 (M and M'=C, Si, Ge, Sn, and Pb): thermochemical data, J. Organomet. Chem., 1971, 29, 195. [all data]

Potzinger and Lampe, 1970
Potzinger, P.; Lampe, F.W., Thermochemistry of simple alkylsilanes, J. Phys. Chem., 1970, 74, 719. [all data]

Distefano, 1970
Distefano, G., Photoionization study of tetramethylsilicon, Inorg. Chem., 1970, 9, 1919. [all data]

Lappert, Simpson, et al., 1969
Lappert, M.F.; Simpson, J.; Spalding, T.R., Bonding studies of compounds of the group IV elements: ionisation potentials of the Me3M radicals, J.Organometal. Chem., 1969, 17, PI. [all data]

Band, Davidson, et al., 1968
Band, S.J.; Davidson, I.M.T.; Lambert, C.A., Bond dissociation energies: electron impact studies on some trimethylsilyl compounds, J. Chem. Soc. A, 1968, 2068. [all data]

Hess, Lampe, et al., 1965
Hess, G.G.; Lampe, F.W.; Sommer, L.H., An electron impact study of ionization and dissociation of trimethylsilanes, J. Am. Chem. Soc., 1965, 87, 5327. [all data]

Khvostenko, Zykov, et al., 1981
Khvostenko, V.I.; Zykov, B.G.; Yuriev, V.P.; Mironov, V.F.; Kovel'zon, G.I.; Panasenko, A.A.; Sheludyakov, V.D.; Gailyunas, I.A., Study of d(π)-p(π) interaction in vinyl- and alkylsilicon-containing compounds by photoelectron spectroscopy, J. Organomet. Chem., 1981, 218, 155. [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]

Starzewski, Richter, et al., 1976
Starzewski, K.-H.A.O.; Richter, W.; Schmidbaur, H., Photoelektronenspektren und Struktur von Arsenyliden. P versus As: Ein Beitrag zur Problematik der ylidischen Bindung, Chem. Ber., 1976, 109, 473. [all data]

deRidder and Dijkstra, 1967
deRidder, J.J.; Dijkstra, G., Mass spectra of the tetramethyl and tetraethyl compounds of carbon, silicon, germanium, tin and lead, Rec. Trav. Chim., 1967, 86, 737. [all data]

Hobrock and Kiser, 1961
Hobrock, B.G.; Kiser, R.W., Electron impact spectroscopy of tetramethylsilicon, -tin and -lead, J. Phys. Chem., 1961, 65, 2186. [all data]

Szepes and Baer, 1984
Szepes, L.; Baer, T., Dissociation dynamics of energy selected hexamethyldisilane ions and the heats of formation of (CH3)3Si+ and (CH3)3Si, J. Am. Chem. Soc., 1984, 106, 273. [all data]

Szepes and Baer, 1984, 2
Szepes, L.; Baer, T., (CH3)3SiX tipusu vegyuletek vizsgalata fotoelectron-fotoion koincidenciaval,I. Meghatarozott belso energiaju hexametil-diszilan-ionok disszociaciojanak dinamikaja, Magy. Kem. Foly., 1984, 90, 104. [all data]

Band, Davidson, et al., Commun. 1967
Band, S.J.; Davidson, I.M.T.; Lambert, C.A.; Stephenson, I.L., Bond dissociation energies and heats of formation of trimethylsilyl compounds, Chem., Commun. 1967, 723. [all data]

Connor, Finney, et al., 1966
Connor, J.A.; Finney, G.; Leigh, G.J.; Haszeldine, R.N.; Robinson, P.J.; Sedgwick, R.D.; Simmons, R.F., Bond dissociation energies in organosilicon compounds, Chem. Commun., 1966, 178. [all data]

Hess, Lampe, et al., 1964
Hess, G.G.; Lampe, F.W.; Sommer, L.H., Bond dissociation energies and ion energetics in organosilicon compounds by electron impact, J. Am. Chem. Soc., 1964, 86, 3174. [all data]

Bastian, et al., 1980
Bastian, E., et al., Ber. Bunsen Gesell. Phys. Chem., 1980, 84, 56. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References