The main objectives of my Ph.D. work were to prepare transition metal complexes, to characterize them by analytical, spectroscopic, electrochemical and crystallographic methods, and also to investigate their catalytic activity and magnetic properties. I followed various kinds of synthetic routes to produce single crystals, solved their structures and studied kinetic & magnetic properties to realize the above mentioned goal. In particular, A novel Cu(II) complex was prepared with carbonato ligand, which was the first report of a polymer showing the rare tridentate mode exhibiting long-range...