Synthesis of Some Transition Metal Complexes Derived from 1-Valeroyl-4-phenyl-3-thiosemicarbazide

Abstract

Abstract The synthesis and characterization of metal complexes of some dipositive metal ions with 1-valeroyl-4-phenyl-3-thiosemicarbazide (VTSC) is reported. The data of elemental analysis, molar conductivities, magnetic measurments and spectral (i.r., visible) studies have been used to elucidate the structure of the complexes. I.r spectra show that VTSC acts as a bidentate ligand and coordinates via 2NH and the enolic carbonyl oxygen (=C-OH) of the hydrazide moiety with the displacement of a hydrogen atom from the latter group. The values of molar conductivities in DMF indicate the non-electrolytic nature of all metal chelates. A tetrahedral structure is proposed for [Co (VTSC-H) Ac], square-planar for [Ni (VTSC-H) Ac] and [Cu (VTSC-H) Ac]H2O complexes, and octahedral for [Ni (VTSC-H)2. 2H2O]2H2O and [Co (VTSC-H)2.2H2O]2H2O complexes according to the data of magnetic and electronic spectral measurments.