Synthesis and crystal structure of square-planar and mixed ligand octahedral nickel(II) O,O′-dicyclopentyl dithiophosphate complexes

Ammonium O,O′-dicyclopentylphosphorodithioate (dcpdtp) has been synthesized from phosphorus pentasulphide and cyclopentanol in the presence of ammonia gas. Its complexes, I=[Ni(dcpdtp)2] and II= [Ni(bp)2(dcpdtp)2] (bp=4benzylpiperidine), have been synthesized and their structures characterized by using UV-vis, IR spectroscopy, magnetic susceptibility measurements and X-ray single crystal structural analysis. The complexes crystallize in the triclinic system (space groups P ī) and exhibit a slightly distorted square planar [NiS4] and trans-octahedral [NiS4N2] geometry for the complexes I and II, respectively.