Synthesis and Spectral Studies of Some Novel Oxovanadium(IV) Complexes of 2,3-Dimethyl-1-Phenyl-4-(2-hydroxy-5-chlorophenylazo)pyrazol-5-one

Abstract

Some novel oxovanadium(IV) complexes of the ligand 2,3-dimethyl-1-phenyl-4-(2-hydroxy-5-chlorophenylazo) pyrazol-5-one (chlorophenolazoantipyrine, CPAAP) with the composition VO(CPAAP)X₂ (where X = ½ SO₄, NO₃, Cl, Br, I, NCS or ClO₄) have been prepared and characterized by elemental analysis, molar conductance, magnetic susceptibility measurements, IR, electronic, ¹H NMR and ESR spectral studies. The ligand and one of its complexes were screened for their antibacterial activity against gram-positive and gram-negative bacteria. The ligand behaves as neutral bidentate in all the complexes. All the complexes show normal magnetic behaviour. The complexes are found to be monomeric and neutral with square pyramidal geometry.