Raju V.J.T. (Professor)Tesfay Kahssu2018-06-202023-11-092018-06-202023-11-092007-03http://etd.aau.edu.et/handle/12345678/2068The multidentate ligand, BDTSTHEBD, was synthesized using precursors such as DAAP, DAAD, BDTHEBD and thiosemicarbazide and was characterized by FTIR, NMR and electronic spectroscopy. Co (II) and Ni (II)-complexes were synthesized using the ligand, BDTSTHEBD, and respective metal chloride in a mole ratio of 1:3 and characterized by analytical studies, FTIR and electronic spectroscopy, conductance, magnetic susceptibility measurement and thermal analysis. The non-electrolyte natures of the complexes were ascertained from conductivity measurements. Atomic absorption spectroscopy (AAS) and thermal analysis (TA) techniques were also used to characterize the metal complexes. UV-VIS and magnetic susceptibility measurements indicate octahedral geometry for Co(II)-complex and tetrahedral geometry for Ni(II)-complex. Key words: Heterocyclic compounds, multidentate ligand, Co (II) and Ni (II) complexes, thiosemicarbazide, synthesis of BDTSTHEBD.enHeterocyclic compounds; multidentate ligand; Co (II) and Ni (II) complexes; thiosemicarbazide; synthesis of BDTSTHEBDThesis