Study of copper(I) heteroleptic compounds with 1-phenyl-1, 4-dihydro-tetrazole-5-thione and triphenylphosphine

Abstract

Abstract The synthesis and structural investigation of three mononuclear heteroleptic copper(I) complexes of 1-phenyl-1,4-dihydro-tetrazole-5-thione (HL) with the stoichiometry [CuX(HL)(PPh3)2], where X represents a halide, are reported. The compounds were studied both in the solid state and in solution by a variety of spectroscopic methods. X-ray crystal structure determination of the three compounds revealed a distorted tetrahedral coordination environment around copper in every case. The thermal behavior of the complexes was investigated with respect to the thione ligand fragmentation. Complexation to copper(I) has a stabilizing effect on the nitrogen-rich thione as the TG studies on the free ligand reveal. **Dedicated to the memory of Professor Stefan I. Stoyanov. Keywords: ThioamideTetrazole thioneCopper(I) complexesCrystal structureThermal behavior Notes **Dedicated to the memory of Professor Stefan I. Stoyanov.