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Synthesis and Characterization of some Tetradentate Schiff Base Complexes

Vasishta D. Bhatt, Ketul N. Patel, Nilesh H. Patel and Jignesh P. Raval

A study on some complexes of Schiff base (MSSB) prepared from salicylaldehyde and mesalamine (5-amino-salicylic acid) is presented here. The metal ions used for the complexation are Co (II), Ni (II), Cu (II), Mn (II), Zn (II) and Cd (II). The characterization of these complexes is attempted using various traditional tools like physical properties, elemental analysis, metal estimation and percentage yield. The modern techniques like magnetic measurements, infrared spectroscopy, UV and visible spectroscopy and thermogravimetric analysis have also been applied to deduce the structure and bonding in these complexes. Using all the above data, an octahedral geometry for the complexes is proposed. While the tetradentate ligand uses it’s four coordinating atoms (3O’s and 1 N) for bonding, the remaining two positions are occupied by aquo ligands.