Germane, 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.

Data compiled by: José A. Martinho Simões

Quantity Value Units Method Reference Comment
Δfgas-17.4 ± 2.1kcal/molReviewMartinho Simões 
Δfgas-25.7 ± 1.5kcal/molReviewMartinho SimõesSelected data.

Condensed 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.

Data compiled as indicated in comments:
MS - José A. Martinho Simões
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Δfliquid-23.9 ± 2.1kcal/molReviewMartinho SimõesMS
Δfliquid-32.2 ± 1.5kcal/molReviewMartinho SimõesSelected data.; MS
Quantity Value Units Method Reference Comment
Δcliquid-886.4 ± 1.5kcal/molCC-SBLong and Pulford, 1986MS
Δcliquid-891.0 ± 2.0kcal/molCC-SBShaulov, Federov, et al., 1969Please also see Pedley and Rylance, 1977.; MS
Quantity Value Units Method Reference Comment
liquid70.937cal/mol*KN/AValerga and Kilpatrick, 1970DH

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
47.06300.Valerga and Kilpatrick, 1970T = 15 to 300 K.; DH

Phase change 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
MS - José A. Martinho Simões
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Ttriple184.360KN/AValerga and Kilpatrick, 1970, 2Uncertainty assigned by TRC = 0.01 K; TRC
Quantity Value Units Method Reference Comment
Δvap6.52 ± 0.1kcal/molCC-SBAbraham and Irving, 1980Other values for the enthalpy of vaporization have been reported: 6.60 ± 0.50 kcal/mol Shaulov, Federov, et al., 1969 and 6.81 kcal/mol Long and Pulford, 1986.; MS

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Method Reference Comment
6.7220285.N/AValerga and Kilpatrick, 1970P = 1 atm; DH
6.72 ± 0.02285.CValerga, 1970AC

Entropy of vaporization

ΔvapS (cal/mol*K) Temperature (K) Reference Comment
23.6285.Valerga and Kilpatrick, 1970P; DH

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (atm)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
200.0 to 317.4.10531166.492-33.005Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
1.7799184.368Valerga and Kilpatrick, 1970DH
1.78184.4Valerga, 1970AC

Entropy of fusion

ΔfusS (cal/mol*K) Temperature (K) Reference Comment
9.653184.368Valerga and Kilpatrick, 1970DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


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: José A. Martinho Simões

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

Germane, tetramethyl- (g) = C3H9Ge (g) + Methane (g)

By formula: C4H12Ge (g) = C3H9Ge (g) + CH4 (g)

Quantity Value Units Method Reference Comment
Δr81.0 ± 3.1kcal/molVLPPSmith and Patrick, 1983 
Δr83.0 ± 4.0kcal/molN/AMcMillen and Golden, 1982 

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:
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
9.56 ± 0.06EIMacLean and Sacher, 1974LLK
9.33 ± 0.04PEJonas, Schweitzer, et al., 1973LLK
9.4 ± 0.1PEEvans, Green, et al., 1972LLK
9.29 ± 0.14EILappert, Pedley, et al., 1971LLK
9.29 ± 0.14EILappert, Simpson, et al., 1969RDSH
11.2EIdeRidder and Dijkstra, 1967RDSH
9.2 ± 0.2EIHobrock and Kiser, 1962Personal communication from R.M. Reese and V.H. Dibeler; RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CH3+20.1 ± 0.5?EIHobrock and Kiser, 1962Personal communication from R.M. Reese and V.H. Dibeler; RDSH
CH3Ge+13.8?EIdeRidder and Dijkstra, 1967RDSH
CH3Ge+16.8 ± 0.4?EIHobrock and Kiser, 1962Personal communication from R.M. Reese and V.H. Dibeler; RDSH
CH4Ge+13.2?EIdeRidder and Dijkstra, 1967RDSH
CH5Ge+13.4?EIdeRidder and Dijkstra, 1967RDSH
C2H6Ge+14.2?EIdeRidder and Dijkstra, 1967RDSH
C2H6Ge+14.1 ± 0.2?EIHobrock and Kiser, 1962Personal communication from R.M. Reese and V.H. Dibeler; RDSH
C2H7Ge+14.2?EIdeRidder and Dijkstra, 1967RDSH
C3H9Ge+10.07 ± 0.07CH3EIMacLean and Sacher, 1974LLK
C3H9Ge+10.05 ± 0.14CH3EILappert, Pedley, et al., 1971LLK
C3H9Ge+10.05 ± 0.14CH3EILappert, Simpson, et al., 1969RDSH
C3H9Ge+11.4CH3EIdeRidder and Dijkstra, 1967RDSH
C3H9Ge+10.2 ± 0.1CH3EIHobrock and Kiser, 1962Personal communication from R.M. Reese and V.H. Dibeler; RDSH
Ge+18.1?EIdeRidder and Dijkstra, 1967RDSH
Ge+19.2 ± 0.5?EIHobrock and Kiser, 1962Personal communication from R.M. Reese and V.H. Dibeler; RDSH
GeH+17.8?EIdeRidder and Dijkstra, 1967RDSH
GeH3+17.1?EIdeRidder and Dijkstra, 1967RDSH

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 Japan AIST/NIMC Database- Spectrum MS-NW-8637
NIST MS number 233396

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References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), Notes

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

Martinho Simões
Martinho Simões, J.A., Private communication (see http://webbook.nist.gov/chemistry/om/). [all data]

Long and Pulford, 1986
Long, L.H.; Pulford, C.I., J. Chem. Soc., Faraday Trans. 2, 1986, 82, 567. [all data]

Shaulov, Federov, et al., 1969
Shaulov, Yu.Kh.; Federov, A.K.; Genchel, V.G., Russ. J. Phys. Chem., 1969, 43, 744. [all data]

Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J., Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [all data]

Valerga and Kilpatrick, 1970
Valerga, A.J.; Kilpatrick, J.E., Entropy related thermodynamic properties of tetramethylgermane, J. Chem. Phys., 1970, 52, 4545-4549. [all data]

Valerga and Kilpatrick, 1970, 2
Valerga, A.J.; Kilpatrick, J.E., Entropy and Related Thermodynamic Properties of Tetramethylgermane, J. Chem. Phys., 1970, 52, 9, 4545, https://doi.org/10.1063/1.1673681 . [all data]

Abraham and Irving, 1980
Abraham, M.H.; Irving, R.J., J. Chem. Thermodyn., 1980, 12, 539. [all data]

Valerga, 1970
Valerga, Antone J., Entropy and Related Thermodynamic Properties of Tetramethylgermane, J. Chem. Phys., 1970, 52, 9, 4545, https://doi.org/10.1063/1.1673681 . [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Smith and Patrick, 1983
Smith, G.P.; Patrick, R., Int. J. Chem. Kinet., 1983, 15, 167. [all data]

McMillen and Golden, 1982
McMillen, D.F.; Golden, D.M., Hydrocarbon bond dissociation energies, Ann. Rev. Phys. Chem., 1982, 33, 493. [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]

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]

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, 1962
Hobrock, B.G.; Kiser, R.W., Electron impact spectroscopy of tetramethylgermanium, trimethylsilane, and dimethylmercury, J. Phys. Chem., 1962, 66, 155. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), References