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 |
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
(l) + 3
(cr) = GaI3 (cr) + 3
(l)
By formula: C3H9Ga (l) + 3I2 (cr) = GaI3 (cr) + 3CH3I (l)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -200.0 ± 8.4 | kJ/mol | RSC | Fowell and Mortimer, 1958 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. |
(l) + 2
(cr) = CH3GaI2 (cr) + 2
(l)
By formula: C3H9Ga (l) + 2I2 (cr) = CH3GaI2 (cr) + 2CH3I (l)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -158.6 ± 4.2 | kJ/mol | RSC | Fowell and Mortimer, 1958 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. |
(g) = C2H6Ga (g) +
(g)
By formula: C3H9Ga (g) = C2H6Ga (g) + CH4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 259. to 272. | kJ/mol | N/A | Smith and Patrick, 1983 | |
ΔrH° | 264. ± 17. | kJ/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
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.9 | PE | Barker, Lappert, et al., 1975 | LLK |
9.87 ± 0.02 | EI | Glockling and Strafford, 1971 | LLK |
9.76 | PE | Barker, Lappert, et al., 1975 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH3Ga+ | 13.65 ± 0.07 | 2CH3 | EI | Glockling and Strafford, 1971 | LLK |
C2H6Ga+ | 10.16 ± 0.03 | CH3 | EI | Glockling and Strafford, 1971 | LLK |
Ga+ | 13.24 ± 0.03 | C2H6+CH3 | EI | Glockling and Strafford, 1971 | LLK |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, NIST Free Links, NIST Subscription Links, 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]
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]
Barker, Lappert, et al., 1975
Barker, G.K.; Lappert, M.F.; Pedley, J.B.; Sharp, G.J.; Westwood, N.P.C.,
Bonding studies of boron and the group 3-5 elements. Part XV. He(I) photoelectron spectra of monomeric group 3 tri-halide, trimethyl, and mixed halogenomethyl species,
J. Chem. Soc. Dalton Trans., 1975, 1765. [all data]
Glockling and Strafford, 1971
Glockling, F.; Strafford, R.G.,
Electron impact studies on some group III metal alkyls,
J. Chem. Soc. A, 1971, 1761. [all data]
Notes
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- 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 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 ΔrH° Enthalpy of reaction at standard conditions 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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