Synthesis, Characterization and Biological Importance of Transition Metal Complexes

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Fernandes Anil Juje
H. V. Jayaprakash

Abstract

The new azomethine compounds derived from Acetophenone nicotinic acid hydrazone and Acetophenone benzhydrazone have been prepared, further it is synthesized with Co(II) and Cu(II) salts to form stable complexes. The ligand and metal complexes have been characterized by Elemental analysis, IR, NMR, UV/Vis Spectrometry measurements, conductivity, biological activities and Gouy Balance method. The nature of bonding and the stereochemistry of the complexes have been deduced from infrared spectra, electronic spectra, magnetic susceptibility, Vibrating sample magnetometer and an octahedral geometry has been suggested for cobalt (II) and copper (II) complexes. The complexes are non-hygroscopic, and photo stable crystalline powders with different melting points. The coordination process takes place through the carbonyl oxygen and the azomethine nitrogen atom. The complexes were proposed to have the formulae [MHL1.1,10. phen. (NO3)2] where M=Co(II), HL1 = Nicotinic acid acid hydrazone and [MHL2.1,10. phen(Cl)2] M=Cu(II) HL2 = acetophenone benzhydrazone.

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