P-Tolylarsine oxide

Phenyldi-p-tolylarsine oxide, CgH5.(C7H7)2AsO, is a white powder, M.pt. 81 C., which gives a basic nitrate, M.pt. 94° C., on boiling with dilute nitric acid. 

Tri-3-amino-tri-p-tolylarsine, formed from the nitro-oxide by reduction wth tin and hydrochloric acid, crystallises in prisms, M.pt. 198° C. It yields a hydrochloride, crystallising in fine, colourless needles, and a crystalline acid stdphate. The triacetyl derivative melts at 228° C., and a ibenzyl derivative (CH3.C8H3.NH.CH2.CgH5)3A,s is formed by heating the amino-arsine with benzyl chloride (3 mols.), but has only been isolated in the form of its hydrochloride. The amino-arsine also condenses with benzaldehyde and with diazobenzene cliloride. 

Phenyldi-p-tolylarsine sulphide, CgHg.(C7H7)g.AsS, prepared from the oxide in the usual manner, melts at 144° C., and is soluble in 1he usual organic solvents. 

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