Thermal decomposition kinetics and mechanism of Mn(II), Ni(II) and Cu(II) Complexes of 3-Formylindole-2-AMINO-5-BROMO Benzoicacid

Manganese(II), Nickel(II) and Copper(II) complexes of the Schiff base, 3-formylindole-2-amino-5-bromobenzoicacid were prepared and characterized by various analytical techniques such as ¹Hnmr, ¹³Cnmr, infrared, mass, electronic spectroscopy, elemental, magnetic and conductance studies. Structural evalution established that a stoichiometry exists between the metal and ligand and the Chelates possess general formula [ML(Ac)(H2O)3]. Geometry of all the complexes was found to be octahedral Thermal decomposition kinetics and mechanism of the metal chelates were studied by TGA and DTA techniques. The TG curves of Mn(II) and Ni(II) showed a three stage decomposition pattern and Cu(II) complex showed a two stage decomposition pattern, which is supported by DTA data.