Trimethylgallium
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Trimethylgallium | |||||||||||||||
other names |
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Molecular formula | C 3 H 9 Ga | |||||||||||||||
Brief description |
clear, colorless liquid |
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properties | ||||||||||||||||
Molar mass | 114.827 g mol −1 | |||||||||||||||
Physical state |
liquid |
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boiling point |
~ 55 ° C |
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Vapor pressure |
193 hPa (20 ° C) |
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solubility |
Reacts violently with water |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Trimethylgallium with the constitutional formula Ga (CH 3 ) 3 , also known as TMG or TMGa , is an organometallic compound of gallium .
presentation
Trimethylgallium can be obtained by reacting gallium trichloride with dimethylzinc at 120 ° C.
A reaction of methyl magnesium chloride with gallium trichloride in diethyl ether leads to trimethyl gallium monodiethyl etherate, the diethyl ether adduct of trimethyl gallium.
properties
At room temperature it is a clear, colorless liquid which is self-igniting in air and reacts violently with water. Trimethylgallium must be stored and handled in a dry protective gas atmosphere at temperatures below 25 ° C.
use
Trimethylgallium is used in the metal-organic gas phase epitaxy (MOVPE) as a gallium source for the production of compound semiconductors such as gallium phosphide (GaP), gallium arsenide (GaAs), gallium antimonide (GaSb), gallium nitride (GaN) and indium gallium nitride (In x Ga 1 − x N), which under among others in the field of optoelectronics are starting materials for the production of light emitting diodes .
Individual evidence
- ↑ a b c D. Shenaikhatkhate, R. Goyette, R. Dicarlojr, G. Dripps: Environment, health and safety issues for sources used in MOVPE growth of compound semiconductors. In: Journal of Crystal Growth. 272, 2004, pp. 816-821, doi : 10.1016 / j.jcrysgro.2004.09.007 .
- ↑ Hess, KL, Dapkus, PD, Manasevit, HM et al. An analytical evaluation of GaAs grown with commercial and repurified trimethylgallium. JEM 11, 1122 (1982). https://doi.org/10.1007/BF02658919 .
- ↑ a b c data sheet trimethylgallium from Sigma-Aldrich , accessed on November 22, 2011 ( PDF ).
- ↑ a b c C. A. Kraus; FE Toonder: Trimethyl gallium, Trimethyl gallium etherate and Trimethyl gallium ammine . In: PNAS . 19, No. 3, 1933, pp. 292-298. doi : 10.1073 / pnas.19.3.292 . PMID 16577510 . PMC 1085965 (free full text).