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Eight novel polypyridine and phenanthroline complexes of Mn(II), Fe(II), Co(II) and Zn(II) (1-8) of the type (M(N-N) 2(L))Cl 2 where N-N is 2,2'-bipyridine (bpy) 2 and 1,10-phenanthroline (phen) 2 with three benzothiazolyl hydrazone ligands L1-L3 were synthesized and characterized by elemental analysis, thermal conductance, UV-Vis, IR, 1 H NMR, electronic absorption and emission spectral methods. The IR, 1 H NMR, electronic absorption and emission spectral data revealed that the ligands coordinate with the metal ions in a bidentate fashion through azomethine nitrogen and phenolic oxygen to form complexes. The analytical and thermogravimetrical data correlated with the observations from IR, 1 H NMR, electronic absorption and emission spectra permitted to attribute that the metal ions are six coordinated in all the complexes.

chemical science transactions

Synthesis and Spectroscopic Characterization of Some Novel Polypyridine and Phenanthroline Complexes of Mn(II), Fe(II), Co(II) and Zn(II) Incorporating a Bidentate Benzothiazolyl Hydrazone Ligand