Synthesis and characterization of copper(I) tetrathiomolybdates

Abstract

A few copper(I) complexes with tetrathiomolybdates of the type A [CuO,MoS₄] [where A isethylenediammonium (0.5enH₂), hydrazinium (0.5-N₂H₆)', dimethylammonium, piperidinium, pyrrolidinium, morpholinium, tetraethylammonium, tetrabutylammonium and tetraphenylphosphonium] have been prepared and characterized. The magnetic and EPR results indicate that copper and molybdenum are in + 1 and +6 oxidation states respectively. The infrared spectral results suggest the tetradentate nature of MoS<img src='http://www.niscair.res.in/jinfo/four1.gif' border=0> . The cathodic peak potential observed at - 0.90V SCE for (NEt₄)[Cu MoS] in cyclic voltammogram is assigned to the reduction of copper(I) to copper(O). The reaction of replacement of the ligand from Cu(Et₂dtc)₂ by MoS<img src='http://www.niscair.res.in/jinfo/four1.gif' border=0> followed by the reduction of Cu(II) to Cu(I), giving [CuMoS₄]^-- reveals that MoS<img src='http://www.niscair.res.in/jinfo/four1.gif' border=0> can act as a potential antagonist to copper.