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  • 1 Wannan Medical College Chemical Laboratory Wuhu 241001 P. R. China Wuhu 241001 P. R. China
  • 2 East China University of Science and Technology Department of Chemistry Shanghai 200237, P. R. China Shanghai 200237, P. R. China
  • 3 Peking University Department of Chemistry Beijing 100871 P. R. China Beijing 100871 P. R. China
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Abstract  

New complexes of the non-natural amino acid (p-iodo-phenylalanine) with divalent cobalt and nickel ions have been synthesized. The composition of the complexes is [M(IC6H4CH2CHNH2COO)2]2.5H2O (M=Co, Ni) and the crystal structure belongs to orthorhombic system. Infrared spectra indicate the nature of bonding in the complex. The first stage in the thermal decomposition process of the complex shows the presence of crystal water. The thermal decomposition process of cobalt complex differs from that of nickel. The intermediate and final residues in the thermal decomposition process have been analyzed to check the pyrolysis reactions. Thermal analysis indicates that the iodine atom of the ligand may coordinate to the metal ion in the lattice.