Abstract
Binuclear complexes of the type Cu2(CH3CO2)4L2 (L=pyridine, 2-chloropyridine, 3-chloropyridine, 2,4-dimethylpyridine, 3,4-dimethylpyridine, isoquinoline) and mononuclear complexes of the type Cu(CH3CO2)2Py3, Cu(CH3CO2)2Py3H2O, Cu(CH3CO2)2(3,4-Lut)2H2O have been investigated by thermogravimetry. A linear correlation is shown to exist between the pKa of the base ligand and the thermal stability of the corresponding binuclear complexes as determined from the thermal analysis data. The results show that the tendency to eliminate the base ligand from these complexes decreases with decreasing basicity of the substituted pyridine. The strong steric effect associated with α-substituted pyridine ligands on the decomposition temperatures of the corresponding complexes is noted.
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