Synthesis and Characterization of New Metal Complexes of 4-(Benzoyl or Phenyl)-1-(2-pyridyl)-3-thiosemicarbazide and 4-Phenyl-1-(2-pyridy)-3-semicarbazide

Abstract

The synthesis and characterization of Co^II, Ni^II, Cu^II and Cu^I complexes of 4-benzoyl-l-(2-pyridyl)-S-thiosemicarbazide (HBPyT), 4-phenyl-l-(2-pyridyl)-3-thiosemicarbazide (HPPyT) and 4-phenyl-1-(2-pyridyl)-3-semicarbazide (HPPyS) are reported. Elemental analyses, molar conductivities, magnetic and spectral (visible, IR) measurements have been used to characterize the complexes. The IR spectral data show that the ligands behave as mono and/or bidentate ligands. HPPyT behaves as a reducing agent towards Cu^II Different stereochemistries are proposed for the Co^II, Ni^II and Cu^II on the basis of spectral and magnetic studies.