Synthesis and Spectral Characterisation of Ni(II) Complexes with Amide Group Ligands Containing 1,8-Naphthyridines

K. Raju, Ch. Nageshwar Rao, I. Sujatha and G. Dayakar*

Department of Chemistry, Kakatiya University, Warangal - 506 009 India.  

Complexes of Nickel(II) with 2-amino-1,8-naphthyridine-3-carboxamide (ANC), 2-amino-N-phenyl-1,8-naphthyridine-3-carboxamide (APNC), 2-amino-N-(p-methyl phenyl)-1,8-naphthyridine-3-carboxamide(AMPNC), 2-amino-N-(p-bromo phenyl)1,8-naphthyridine-3-carboxamide(ABPNC), 2-amino-N-(p-chloro phenyl)-1,8-naphthyridine-3-carboxamide (ACPNC), 2-amino-N-(p-methoxy phenyl)-1,8-naphthyridine-3-carboxamide (AMYPNC), 2-methyl-N-O-carboxyphenyl-1,8-naphthyridine-3-carboxamide (MCNC) and 2-phenyl-N-O-carboxyphenyl-1,8-naphthyridine-2-carboxamide (PCNC) have been synthesized. These complexes were characterized by elemental analysis, molar conductance, thermal studies, magnetic susceptibility, IR and electronic spectra. Based on th above studies, the ligands coordinated to the metal ion in a bidentate fashion through the amide nitrogen and oxygen. The remaining coordination centers are satisfied by acetates and H2O molecules. Electronic spectra and magnetic susceptibility measurements reveal octahedra geometry around the metal ion. The complexes were found to non-electrolytic in nature on the basis of low value of molar conductance.

Ni(II) complexes; amide group ligands; 1,8-Naphthyridines