Gallium trimethyl
- Formula: C3H9Ga
- Molecular weight: 114.827
- IUPAC Standard InChIKey: XCZXGTMEAKBVPV-UHFFFAOYSA-N
- CAS Registry Number: 1445-79-0
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: trimethylgallium
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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 | -46.2 ± 8.1 | kJ/mol | Review | Martinho Simões | |
ΔfH°gas | -25.7 ± 9.9 | kJ/mol | Review | Martinho Simões | |
ΔfH°gas | -36. ± 10. | kJ/mol | Review | Martinho Simões | Selected data. The enthalpy of formation is the average of the values from Long and Sackman, 1958 and Fowell and Mortimer, 1958. |
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 | -79.3 ± 8.1 | kJ/mol | Review | Martinho Simões | MS |
ΔfH°liquid | -58.8 ± 9.9 | kJ/mol | Review | Martinho Simões | MS |
ΔfH°liquid | -69. ± 10. | kJ/mol | Review | Martinho Simões | Selected data. The enthalpy of formation is the average of the values from Long and Sackman, 1958 and Fowell and Mortimer, 1958.; MS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -2933.0 ± 7.9 | kJ/mol | CC-SB | Long and Sackman, 1958 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970.; MS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 252.1 | J/mol*K | N/A | Lebedev, Smirnova, et al., 1988 | DH |
Constant pressure heat capacity of liquid
Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
188.0 | 298.15 | Lebedev, Smirnova, et al., 1988 | T = 0 to 330 K.; DH |
178.87 | 298.15 | Maslova, Novoselova, et al., 1973 | T = 60 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
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Ttriple | 257.81 | K | N/A | Lebedev, Smirnova, et al., 1988, 2 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC |
Ttriple | 257.9 | K | N/A | Maslova, Novoselova, et al., 1973, 2 | Uncertainty assigned by TRC = 0.2 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 33.1 ± 0.8 | kJ/mol | CC-SB | Long and Sackman, 1958 | MS |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
35.6 | 259. to 263. | Fulem, Ruzicka, et al., 2003 | AC |
Enthalpy of sublimation
ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
47.4 | 225. to 257. | N/A | Fulem, Ruzicka, et al., 2003 | AC |
45.2 | 252. | A | Stephenson and Malanowski, 1987 | Based on data from 247. to 257. K.; AC |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
11.046 | 257.9 | Maslova, Novoselova, et al., 1973 | DH |
11.05 | 257.9 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
42.83 | 257.9 | Maslova, Novoselova, et al., 1973 | DH |
Enthalpy of phase transition
ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
0.333 | 244.5 | crystaline, II | crystaline, I | Lebedev, Smirnova, et al., 1988 | DH |
10.602 | 257.81 | crystaline, I | liquid | Lebedev, Smirnova, et al., 1988 | DH |
Entropy of phase transition
ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
1.36 | 244.5 | crystaline, II | crystaline, I | Lebedev, Smirnova, et al., 1988 | DH |
41.1 | 257.81 | crystaline, I | liquid | Lebedev, Smirnova, et al., 1988 | DH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change 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 Sackman, 1958
Long, L.H.; Sackman, J.F.,
The heat of formation and physical properties of gallium trimethyl,
Trans. Faraday Soc., 1958, 54, 1797, https://doi.org/10.1039/tf9585401797
. [all data]
Fowell and Mortimer, 1958
Fowell, P.A.; Mortimer, C.T.,
J. Chem. Soc., 1958, 3734.. [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]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds
in Academic Press, New York, 1970. [all data]
Lebedev, Smirnova, et al., 1988
Lebedev, B.V.; Smirnova, N.N.; Kulagina, T.G.,
Enthalpy, entropy and Gibbs energy in bulk polymerization of cyclohexene with ring-opening between 0 and 330 K at standard pressure, Makromol. Chem.,
Rapid Commun., 1988, 9, 781-784. [all data]
Maslova, Novoselova, et al., 1973
Maslova, V.A.; Novoselova, N.V.; Moseeva, E.M.; Berezhnaya, N.D.; Rabinovich, I.B.,
Specific heat and phase changes of triethylindium, triethyl antimony, and trimethyl gallium,
Trudy. Khim. Khim. Tekhnol., 1973, (2), 51-52. [all data]
Lebedev, Smirnova, et al., 1988, 2
Lebedev, B.V.; Smirnova, N.N.; Kulagina, T.G.,
Enthalpy, Eentropy and Gibbs Energy in bulk polymerization of cyclohexane with ring-opening between 0 and 330 K at standaed pressure,
Makromol. Chem., Rapid Commun., 1988, 9, 781. [all data]
Maslova, Novoselova, et al., 1973, 2
Maslova, V.A.; Novoselova, N.V.; Moseeva, E.M.; Berezhnaya, N.D.; Rabinovich, I.B.,
Specific Heat and Phase Changes of Triethylindium, Triethylantimony, and Trimethylgallium,
Tr. Khim. Khim. Tekhnol., 1973, 1973, 51. [all data]
Fulem, Ruzicka, et al., 2003
Fulem, M.; Ruzicka, K.; Ruzicka, V.; Hulicius, E.; Simecek, T.; Melichar, K.; Pangrác, J.; Rushworth, S.A.; Smith, L.M.,
Vapor pressure of metal organic precursors,
Journal of Crystal Growth, 2003, 248, 99-107, https://doi.org/10.1016/S0022-0248(02)01840-7
. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D.,
Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III,
J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions Ttriple Triple point temperature ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition 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 ΔsubH Enthalpy of sublimation ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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