Tertiary butyl arsine

Arsine (ASH3) and phosphine (PH3) are extremely toxic, so less hazardous substitutes such as tertiary butyl arsine, C4H1 j As, and tertiary butyl phosphine, C4H11P, are being considered. 

Metallorganic chemical vapor deposition (MOCVD) is now widely used in the preparation of III-V and II-VI devices. In addition to the hydride gases used as source materials in other CVD systems (e g., arsine and phosphine), less toxic liquid alternatives (e.g., tertiary butyl arsine and tertiary butyl phosphine) are also used in MOCVD systems along with other toxics such as cadmium alkyls and mercuiy.[42][43]... 

Whereas the lithium aluminium hydride reduction of an optically active benzylphos-phonium salt in tetrahydrofuran leads to a racemic or highly racemized tertiary phosphine and toluene, the reduction of (—)-benzyl(n-butyl)methylphenylarsonium bromide (68) or (S)-(-(-)-benzylmethylphenyl(n-propyl)arsonium bromide, (S)-(-I-)-64, with this reagent affords (—)-n-butyImethylphenylarsine, ( —)-12, or (S)-(-l-)-methyl-phenyl(n-propyl)arsine, (S)-(-)-)-65, of similar optical purity to the products obtained by cathodic reduction of the respective arsonium compounds (Table 4) . Moreover,... 

The optically active arsinous acid esters 128-134 and the arsinthious acid ester 135 have been used to prepare optically active tertiary arsines (Table 7). When the arsine sulphide 136 was heated in benzene with n-butyl or -propyl bromide, ethyl bromide was eliminated and there was a reversal in the sign of the rotation, which was attributed to the formation of the inverted n-butyl and n-propyl esters of (p-carboxyphenyl)phenyl-arsinthious acid, 137a and 137b, respectively (equation 18) . 

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