Mixed halide dialkyldithiophosphate derivatives of arsenic(III) and antimony(III)

Abstract

Mixed chloride dialkyldithiophosphates of arsenic(III) and antimony(III), [(RO) 2PSS] n MCl 3−n (M = As, Sb; n = 1, 2; R = C 2H 5, n-C 3H 7, i-C 3H 7 and i-C 4H 9) have been synthesized for the first time by the reac metal chlorides with sodium dialkyldithiophosphates or alternatively by co-disproportionation reactions of metal chlorides with metal tris(dialkyldithiophosphates) in different stoichiometric ratios. Mixed halide dialkyl-dithiophosphates of antimony(III) have also been prepared by the cleavage reactions of antimony tris(diisopropyldithiophosphate) with bromine or iodine. Hydrolysis reactions of a few of these compounds have also been studied. The new compounds have been characterized by elemental analyses, molecular weight determinations (cryoscopic) as well as IR and NMR ( 1H, 31P) data; chelated structures with bidentate dialkyldithiophosphate groups are proposed.