Synthesis, spectral, thermal and antibacterial studies of oxovanadium(IV) complex of an azo dye derived from 4–aminoantipyrine

Abstract

Synthesis of oxovanadium (IV) complex with anazodye 4–[(E)–(4–hydroxy–2,5 dimethylphenyl) diazenyl]–1,5–dimethyl–2–phenyl–1,2–dihydro–3H–pyrazol–3–one (HL) derived from 4–aminoantipyrine and 2,5-dimethylphenol are reported. The complex has been characterized by elemental analysis, molar conductance, magnetic susceptibility data, FT–IR, UV–Vis, NMR and ESR spectra.The physico–chemical studies and spectral data indicate that HL acts as a bidentate chelating ligand. The thermal behaviour of the complex was investigated by thermogravimetric techniques. The complex is found to be neutral and a square pyramidal geometry has been tentatively proposed. The ligand HL and complex were screened for antibacterial activity.