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Synthesis and characterization of aldazine ligands containing sulfur and nitrogen donor atoms and its cobalt, nickel and iron complexes

Gholamreza Kiani, Behzad Eskandary Azar

A linking ligands containing sulfur and nitrogen donor atoms in the terminal thiophene and pyrrole rings, 1,2-bis(thiophene-2-ylmethylene)hydrazine (L1) and 1,2-bis(pyrrolyle-2-ylmethylene)hydrazine (L2) were prepared by Schiff-base condensation. Some complexes have been prepared by salts of CoCl2, NiCl2 and FeCl3 reactingwith azine ligands dissolved in alcohol in the molar ratio of (1:2). The prepared complexes were characterized by using IR, UV-Visible and cyclic voltammetry. Conductivity of the powder samples were measured by two probe method.We report here the synthesis, characterization and electrochemical behavior of azines and its complexes. Measured electrical conductivities of Co(II), Fe(III) and Ni(II) complexes of azines are investigated in this study. It is found that at room temperature these complexes show insulator behavior.