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2 Polish Journal of Chemistry

2 2001

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Synthesis and Characterization of Iron(III), Cobalt(II), Nickel(II) and Copper(II) Complexes of 4-Formylazohydrazoaniline Antipyrine

El-Saied F., Ayad M. I., Issa R. M., Aly S. A.

Polish Journal of Chemistry

2001

Vol. 75, nr 6

773-783

4-Formylazohydrazoaniline antipyrine and its iron(III), cobalt(II), nickel(II) and copper( II) complexes have been synthesized and characterized by IR, electronic spectra, molar conductivities, magnetic susceptibilities and ESR. The ligand behaves as a neutral bidentate and tridentate ligand in the hydrazo form or monobasic tridentate ligand in the enol-azo form. Coordination takes place via the carbonyl oxygen of the side chain, azomethine nitrogen atom for bidentate coordination. The carbonyl oxygen of the pyrazolone ring is added for tridentate coordination and enolic oxygen appears in monobasic tridentate coordination.

Copper(II) Complexes of 4-Azocyanoacetamidoaniline Antipyrine and 4-Azocyanoacetamido-m-toludine Antipyrine

El-Saied F., Ayad M. I., Issa R. M., Aly S. A.

Polish Journal of Chemistry

2001

Vol. 75, nr 7

941-947

The synthesis and characterization of copper(II) complexes with 4-azocyanoacetamidoaniline antipyrine (HL1) and 4-azocyanoacetamido-m-toludine antipyrine (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 or monobasic bidentate ones, either in the ketoazo or enolazo form. The IR spectra also show that, in the chlorocomplexes (1 and 4), the cyano group is changed to amide (--CO--NH2). Stereochemical structures for the complexes are proposed.