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1 2004

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Thermal, Spectral, magnetic and Biological studies of Thiosemicarbazones Complexes with Metal Ions: Cu(II), Co(II), Ni(II), Fe(III), Cd(II), Zn(II), MN(II) and UO2(VI)

Mashaly M., Seleem H., El-Behairy M., Habib H.

Polish Journal of Chemistry

2004

Vol.78 /nr 11-12

2055-2074

Thiosemicarbazones ligands, isatin-3-thiosemicarbazone (HIT) and N-acetylisatin-3- thiosemicarbazone (HAIT), which have tridentate ONN coordinating sites were prepared. The complexes of both ligands with Cu(II), Co(II), Ni(II), Fe(III), Cd(II), Zn(II), Mn(II) and UO2(VI) ions were isolated. The ligands and their metal complexes were characterized by elemental analyses, IR, UV-Vis and mass spectra, also by conductance, magnetic moment and TG-DSC measurements. All the transition metal complexes have octahedral configurations, except Cu-complexes, which were found to have the squareplanar geometry and theUO2(VI) complexes which have coordination number 8 and may acquire the distorted dodecahedral geometry. Thermal studies explored the possibility of obtaining new complexes. Inversion from octahedral to square-planar configuration occurred upon heating the parent Ni-HAIT complex to form the corresponding pyrolytic product. The antifungal activity against the tested organisms showed that some metal complexes enhanced the activity with respect to the parent ligands.