THERMAL AND STRUCTURAL STUDIES OF THE CHLORO COMPLEXES OF COBALT AND COPPER WITH 2-AMINO-3-METHYLPYRIDINE

The chloro complexes of 2-amino-3-methylpyridine with cobalt(II) and c opper(II) have been prepared in ethanolic solution and solid compounds have been isolated. The compounds have stoichiometry ML(2)Cl(2) where M is Co2+ or Cu2+ and L is 2-amino-3-methylpyridine. Spectral and mag netic studies have been used to obtain information about the environme nt of the metal ion in these compounds. The compounds have tetrahedral structures. The thermal decomposition of each compound has been studi ed using thermogravimetry and differential thermal analysis. Thermogra vimetry studies show that the cobalt complex forms an intermediate com pound before the metal oxide is produced while the copper compound und ergoes decomposition with loss of organic ligand and the formation of copper chloride which then decomposes to give an oxide of copper. The enthalpy of reaction for each of the processes has been calculated fro m the thermal analysis curves.