Synthesis, characterization and thermal behaviour of ZnS₄P₂ chromophore as prototype

Abstract

Complexes of the type M (PPh₃)₂(dtc)₂ where M =Co(II), Ni(II), Zn(II) and Hg(II), PPh₃ =triphenylphosphine and dtc = sodium diethyldithiocarbamate, have been synthesized and characterized by elemental analysis, IR , UV -vis spectroscopy, TGA/DSC, magnetic moment and conductivity measurements. On the basis of these studies, an octahedral geometry has been proposed for all the complexes. The Zn-complex exhibits two-step thermogram leading to the formation of ZnS₄ as the end product at 900°C. Symmetrical bidentate coordination of the dithiocarbamato group has been observed in all the cases. Conductivity measurements of 1 m<i>M </i>solution of the complexes in DMSO show them to be non-electrolytes.