Our Approach Was To Synthesize Some Mononuclear To Tetranuclear Coordination Complexes With A Variety Of Multidentate Ligands Having Rigid, Semi-Rigid And Flexible Spacers. A New Family Of Homodinuclear Copper(II) And Zinc(II) Complexes With Different Schiff Base Ligands Containing Rigid Aromatic Spacers Have Been Studied To Establish The Synthetic, Structural, Magnetic, Spectral Aspects And Theoretically Studied To Rationalize The Magnetic Interaction. A Novel Group Of Tetranuclear Copper [(II)4] Complexes Using Various Exogenous Bridge Were Explored With A Semi Rigid Imidazolidine Spacer Containing Ligand And Synthetic Methodologies Were Standardized. Some Template Reactions Using 2-Formyl Phenol (Hfp) Or 2,6-Diformyl 4-Methyl Phenol (Hdfp) To Produce Novel Homo And Hetero-Bimetallic Systems Were Studied. Conformational Isomerism Upon Metal Coordination In A Hexadentate Piperazine Ligand Were Studied In A Group Of Tetranuclear And Dinuclear Complexes And Reveals Various Conformations Of Semi Rigid Piperazine Motif. Different Coordination Modes Of Hexadentate Ligands Containing Flexible Spacers Leads To Different Trinuclear Molecular Architecture (Triangular And Linear) Were Also Studied. Hexadentate Ligands Having Different Donor Atoms And Flexible Spacers Leads To Mononuclear Nickel Complexes Were Studied To Reveal The Role Of Rigidity Of Tridentate Arms Of The Ligands.
A Dissertation Submitted To The Indian Institute Of Technology, Kharagpur In Partial Fulfillment Of The Requirements For The Award Of The Degree Of Doctor Of Philosophy By Alok Ranjan Paital, Department Of Chemistry Indian Institute Of Technology Kharagpur-721302, India March, 2007,Dr. Debashis Ray ,Associate Professor Of Chemistry Synthetic Inorganic Chemistry Laboratory .