Trimethylgermanium chloride is an organogermanium compound with the chemical formula . It is a colorless liquid.
Synthesis Trimethylgermanium chloride can be synthesized in high yield by reacting tetramethylgermanium with hydrogen chloride in the presence of aluminium trichloride as a catalyst.
It can also be synthesized by reaction of tetramethylgermanium with dimethylgermanium dichloride in a 1:1 molar ratio, with methylgermanium trichloride in a 2:1 molar ratio, or with germanium tetrachloride in a 3:1 molar ratio, in the presence of gallium trichloride as a catalyst.
Uses Trimethylgermanium chloride can be used to make trimethyl(2-thienyl)germane. It is also used as a methylating agent and precursor to prepare Grignard reagents in organic synthesis. It can be used as a precursor to germanium-masked dienolates for regioselective C-C bond formation, germanium enolates and α-germanate esters for aldol condensation reactions, Claisen rearrangements, and Peterson-type reactions.
Reactions Trimethylgermanium chloride is sensitive to moisture. It reacts slowly with water, producing trimethylgermanol and hydrogen chloride.
It reacts with tris(trimethylsilyl)antimony to give tris(trimethylgermyl)antimony and trimethylsilyl chloride.
Safety When it burns, it releases toxic and irritating smoke and gases including carbon monoxide, carbon dioxide, hydrogen chloride, germanium monoxide and germanium dioxide.
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