STUDIES ON SYNTHESIS, OXYGENATION THERMOD YNAMICS AND KINETICS OF THERMAL-DECOMPOSITION OF COBALT(II) SCHIFF-BASE COMPLEXES

Two new cobalt( II) schiff base complexes were prepared and characteri zed by elemental analyses, IR spectra and thermal analyses. The compos itions of the complexes were also determined. Saturated oxygen uptake of the complexes in CH3CN solvent at different temperatures was obtain ed by manometric oxygen-uptake measurements. Oxygenation equilibrium c onstants and its thermodynamic parameters Delta H degrees, Delta S deg rees were calculated from the above measurements. The effects of tempe rature and ligand structure on oxygenation were discussed. The thermal stability and non-isothermal kinetics of thermal decomposition reacti on were also investigated by TG-DTG technique. The possible reaction m echanisms of their first step of thermodecomposition were deduced by m eans of integral and differential equations.