Raju V.J.T. (Professor)Berhanu Alemnew2018-06-132023-11-092018-06-132023-11-092009-06http://etd.aau.edu.et/handle/12345678/661New Ni(II) and Zn(II) chelates formed by the derivatization of the ninhydrin with ethylenediamine (en) in the presence of NiCl2 .6H2O,and Zn(CH3COO)2.2H2O were synthesized by template procedure in methanol-ethanolic medium. Both complexes were distinctly colored and stable to atmospheric conditions. The purity of the complexes were established by thin layer chromatography. The complexes were characterized on the basis of chemical analysis, conductivity, IR spectroscopy, UV-vis & NMR spectroscopy, and magnetic susceptibility studies. From the conductivity measurements, it is concluded that the complex of Ni(II) is a 1:1 type of electrolyte and Zn(II) is non-electrolyte. The results suggest that the formation of a 1:1 condensation product between ninhydrin and ethylenediamine in both complexes. Octahedral geometry for Ni(II) and tetrahedral geometry for the Zn(II) complexes have been proposed.. KEY WORDS: metal complexes, Schiff base, ninhydrin, ethylenediamine, template method, synthesis, characterization.enmetal complexes; Schiff base; ninhydrin; ethylenediamine, template method; synthesis; characterization.Thesis