Arsine, dialkylamino

Reaction with CS2 is general for tris(dialkylamino)arsines and the tris(dialkyldithiocarbamidato)arsanes may be used for characterization. 

The As N bond is labile compared to the As-C, As-O, or As-S bonds and this has been widely exploited in synthetic arsenic chemistry. For example, heating secondary amines with tris(dialkylamino)arsines effects transamination (eqnation 34). 

These tris(dialkylamino)arsines give access to a wide variety of compounds, which is illustrated for As(NMe2)3 in Scheme 4. ... 

Dialkyl- and diaryl-chloroarsines are formed in good yield from dichloro-(A,iV-dialkylamino)arsines and organo-magnesium or -lithium compounds.493 Dichloro(pentafluorophenyl)arsine and chlorobis(pentafluorophenyl)arsine are obtained analogously from pentafluorophenylmagnesium bromide and arsenic trichloride or dichloro-(A,iV-dimethylamino)arsine.494... 

Tris(dimethyIamino)arsine is prepared by dimethylaminolysis of arsenic(III) chloride in a suitable solvent. The reaction is generally applicable since arsenic(III) iodide and alkyl-haloarsines of the general formula R AsX3 (ra = 1 or 2, X = Cl, Br, or I) have been reported to react similarly with secondary amines. In addition to dimethylamine, other secondary amines, such as diethylamine, have been used to prepare the corresponding tris(dialkylamino)arsine. Tris(dialkyl-amino) arsines have also been prepared by transamination of tris(dimethylamino) arsine with higher-boiling secondary amines such as diethylamine, di-n-butylamine, or piperidine. 

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