Trimethylarsine

Trimethylarsine is an organoarsenic compound with the chemical formula As(CH3)3. It is a volatile, colorless liquid with a strong, unpleasant odor. The compound is highly toxic and flammable. It can be prepared by the reaction of arsenic trichloride with methylmagnesium bromide or methyl lithium. Trimethylarsine is soluble in organic solvents and slightly soluble in water.

This compound is of interest in coordination chemistry as a ligand, although its use is limited due to its toxicity and reactivity. It can form complexes with various transition metals. In some industrial processes, particularly in the semiconductor industry, organoarsenic compounds like trimethylarsine have been explored as precursors for the deposition of arsenic-containing thin films through techniques like chemical vapor deposition. However, due to its hazardous nature, stringent safety protocols are required for its handling and storage. Its environmental impact is also a concern, as arsenic compounds can be persistent and toxic. Research into less toxic alternatives for these applications is ongoing.