Copper(II) complexes of 4-azocyanoacetamidoaniline antipyrine and 4-azocyanoacetamido-m-toludine antipyrine

The synthesis and characterization of copper(II) complexes with 4-azocyanoa cetamido-aniline antipyrine (HL1) and 4-azocyanoacetamido-m-toludine antipy rine (HL2) are reported. Elemental analyses, molar conductivities, magnetic moments and spectral (IR, electronic and ESR) studies have been used. The elemental analyses and IR spectra show that the ligands behave as neutral o r monobasic bidentate ones, either in the ketoazo or enolazo form. The IR s pectra also show that, in the chlorocomplexes (1 and 4), the cyano group is changed to amide (-CO-NH2). Stereochemical structures for the complexes ar e proposed.