Synthesis and spectroscopic characterization of toluene-3,4-dithiolatoarsenic(III)-O,O'-ditolyl/alkylene dithiophosphate compounds: crystal structure of [CH3C6H3S2As{S2P(OC6H4Me-m)2}]

Toluene-3,4-dithiolate complexes, [CH3C6H3S2As{S2P(OR)(2)}] and [CH(3)C(6)H(3)S(2)AsS(2)POGO] (R = o-, m-, p-C6H4Me; G = -CH2C(CH3)(2)CH2-, -CHCH3CH2(CH3)(2)C-), have been synthesized by reaction of toluene-3,4-dithiolatoarsenic(III) chloride [C6H3(CH3)S2AsCl] with ammonium salts of the corresponding O,O'-ditolyl/alkylene dithiophosphate by refluxing in benzene followed by stirring. These complexes have been characterized by elemental analysis and IR, H-1, and P-31 NMR spectroscopy. Single-crystal X-ray diffraction analysis of [CH3C6H3S2As{S2P(OC6H4Me-m)(2)}] revealed distorted trigonal-bipyramidal geometry with an anisobidentate chelating mode of the ditolyl moiety in these complexes.