Conformational trends in arsocane dithiophosphinates X(CH<sub>2</sub>CH<sub>2</sub>S)<sub>2</sub>AsS<sub>2</sub>PR<sub>2</sub>(X = O or S; R = Me, Et or Ph)
arsocane diorganodithiophosphinates X(CH2CH2S)2AsS2PR2(X = O or S; R = Me, Et or Ph) have been prepared in CH2Cl2 or benzene from X(CH2CH2S)2AsCl (X = O or S) and the corresponding sodium or ammonium dithiophosphinates. The compounds were characterised by IR, mass and 1H, 13C and 31P NMR spectroscopy. The single-crystal structures of O(CH2CH2S)2AsS2PPh2 and S(CH2CH2S)2AsS2PPh2 were determined. Both show