Germane, tetramethyl-
- Formula: C4H12Ge
- Molecular weight: 132.78
- IUPAC Standard InChIKey: ZRLCXMPFXYVHGS-UHFFFAOYSA-N
- CAS Registry Number: 865-52-1
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Tetramethylgermane; Tetramethylgermanium; (CH3)4Ge; Germanium, 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 |
---|---|---|---|---|---|
ΔfH°gas | -17.4 ± 2.1 | kcal/mol | Review | Martinho Simões | |
ΔfH°gas | -25.7 ± 1.5 | kcal/mol | Review | Martinho Simões | Selected 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 |
---|---|---|---|---|---|
ΔfH°liquid | -23.9 ± 2.1 | kcal/mol | Review | Martinho Simões | MS |
ΔfH°liquid | -32.2 ± 1.5 | kcal/mol | Review | Martinho Simões | Selected data.; MS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -886.4 ± 1.5 | kcal/mol | CC-SB | Long and Pulford, 1986 | MS |
ΔcH°liquid | -891.0 ± 2.0 | kcal/mol | CC-SB | Shaulov, Federov, et al., 1969 | Please also see Pedley and Rylance, 1977.; MS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 70.937 | cal/mol*K | N/A | Valerga and Kilpatrick, 1970 | DH |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
47.06 | 300. | Valerga and Kilpatrick, 1970 | T = 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 |
---|---|---|---|---|---|
Ttriple | 184.360 | K | N/A | Valerga and Kilpatrick, 1970, 2 | Uncertainty assigned by TRC = 0.01 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 6.52 ± 0.1 | kcal/mol | CC-SB | Abraham and Irving, 1980 | Other 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 |
---|---|---|---|---|
6.7220 | 285. | N/A | Valerga and Kilpatrick, 1970 | P = 1 atm; DH |
6.72 ± 0.02 | 285. | C | Valerga, 1970 | AC |
Entropy of vaporization
ΔvapS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
23.6 | 285. | Valerga and Kilpatrick, 1970 | P; 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. | 4.1053 | 1166.492 | -33.005 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
1.7799 | 184.368 | Valerga and Kilpatrick, 1970 | DH |
1.78 | 184.4 | Valerga, 1970 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
9.653 | 184.368 | Valerga and Kilpatrick, 1970 | DH |
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
(g) = C3H9Ge (g) +
(g)
By formula: C4H12Ge (g) = C3H9Ge (g) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 81.0 ± 3.1 | kcal/mol | VLPP | Smith and Patrick, 1983 | |
ΔrH° | 83.0 ± 4.0 | kcal/mol | N/A | McMillen 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 ± 0.06 | EI | MacLean and Sacher, 1974 | LLK |
9.33 ± 0.04 | PE | Jonas, Schweitzer, et al., 1973 | LLK |
9.4 ± 0.1 | PE | Evans, Green, et al., 1972 | LLK |
9.29 ± 0.14 | EI | Lappert, Pedley, et al., 1971 | LLK |
9.29 ± 0.14 | EI | Lappert, Simpson, et al., 1969 | RDSH |
11.2 | EI | deRidder and Dijkstra, 1967 | RDSH |
9.2 ± 0.2 | EI | Hobrock and Kiser, 1962 | Personal communication from R.M. Reese and V.H. Dibeler; RDSH |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH3+ | 20.1 ± 0.5 | ? | EI | Hobrock and Kiser, 1962 | Personal communication from R.M. Reese and V.H. Dibeler; RDSH |
CH3Ge+ | 13.8 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
CH3Ge+ | 16.8 ± 0.4 | ? | EI | Hobrock and Kiser, 1962 | Personal communication from R.M. Reese and V.H. Dibeler; RDSH |
CH4Ge+ | 13.2 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
CH5Ge+ | 13.4 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
C2H6Ge+ | 14.2 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
C2H6Ge+ | 14.1 ± 0.2 | ? | EI | Hobrock and Kiser, 1962 | Personal communication from R.M. Reese and V.H. Dibeler; RDSH |
C2H7Ge+ | 14.2 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
C3H9Ge+ | 10.07 ± 0.07 | CH3 | EI | MacLean and Sacher, 1974 | LLK |
C3H9Ge+ | 10.05 ± 0.14 | CH3 | EI | Lappert, Pedley, et al., 1971 | LLK |
C3H9Ge+ | 10.05 ± 0.14 | CH3 | EI | Lappert, Simpson, et al., 1969 | RDSH |
C3H9Ge+ | 11.4 | CH3 | EI | deRidder and Dijkstra, 1967 | RDSH |
C3H9Ge+ | 10.2 ± 0.1 | CH3 | EI | Hobrock and Kiser, 1962 | Personal communication from R.M. Reese and V.H. Dibeler; RDSH |
Ge+ | 18.1 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
Ge+ | 19.2 ± 0.5 | ? | EI | Hobrock and Kiser, 1962 | Personal communication from R.M. Reese and V.H. Dibeler; RDSH |
GeH+ | 17.8 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
GeH3+ | 17.1 | ? | EI | deRidder and Dijkstra, 1967 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, 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.
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, References
- Symbols used in this document:
AE Appearance energy Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions Ttriple Triple point temperature ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔrH° Enthalpy of reaction at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ΔvapS Entropy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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