This book gives an idea about synthesis of Coordination complexes with various 3d metal ions. The book represents the metals coordination with ligand named Kynurenic acid. It is a very important neurological drug with various biological applications. The book contains details about metal ions with their physical properties.It highlights various spectroscopic techniques like UV- Visible spectroscopy, IR spectroscopy, Mass spectroscopy, Thermal analysis.The book also includes Physical, electronic and magnetic properties of metal complexes. Fluorescence study of complexes shows interesting results in this work. The book includes the brief idea of formation of coordination complexes with their coordinating structures.