SYNTHESIS AND CHARACTERIZATION OF COPPER(I) TETRATHIOMOLYBDATES

A few copper(I) complexes with tetrathiomolybdates of the type A [CuMoS4][where A is ethylenediammonium (0.5enH-2), 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 MoS42-. The cathodic peak potential observed at - 0.90V SCE for (NEt4)[CuMoS4] 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 MoS42- followed by the reduction of Cu(II) to Cu(I), giving [CuMoS4]- reveals that MoS42- can act as a potential antagonist to copper.