Synthesis and Structural Studies of Some New Cobalt (II) Complexes with Chloride and Heterocyclic Nitrogen Donor ligands
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A new series of cobalt complexes of type [Co(L)6]Cl2 (where L =imidazole, pyridine, piperidine, piperazine, indole, triazole, benzimidazole, benzotriazole, quinoline, iso-quinoline and carbazole) have been synthesized and are well characterized by elemental analysis, IR, UV, Mass spectra and magnetic measurements. The thermal studies of these complexes are also reported. All these complexes are soluble in ethanol and the conductance measurement shows that all the complexes are of 1:2 type electrolyte. The IR spectra show clear indication for coordination between central cobalt atom and nitrogen atom of the ligands. The mass spectra clearly show the molecular ion peak and base peak at appropriate place. On thermo gravimetric analysis, it is found that the metal atom and chlorine are strongly attached to each other. The ligands are loosely attached and are removed first on heating. Finally considering all the spectral analysis, conductance values, thermo gravimetric analysis, octahedral structure are proposed for these complexes
Cobalt, complexes. IR spectra, conductance, mass spectra.