Trimethylgallium

• TMG
• TMGa

Clear, colorless liquid

Liquid

1.132 g · cm -3 ( 25 ° C)

-15.8 ° C

92.5 ° C

193 hPa ( 20 ° C)

Reacts violently with water

Risk

Template: Infobox chemical / molecular formula search available

Trimethyl gallium, also called TMG or as TMGa is an organometallic compound of gallium.

Representation

Trimethyl gallium can be obtained by the reaction of gallium trichloride with dimethylzinc at 120 ° C.

A reaction of methyl magnesium chloride in diethyl ether resulting trimethyl gallium monodiethyletherat, the Diethyletheradukt of trimethylgallium.

Properties

It is a clear, colorless liquid, which is itself flammable in air and reacts violently with water at room temperature. Trimethylgallium must be stored and handled under dry protective gas atmosphere at temperatures below 25 ° C.

Use

Trimethylgallium is used as part of the metal-organic vapor 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 in, inter alia, the field of optoelectronics as materials for the production of light emitting diodes is used.