Synthesis, spectroscopic studies and solid state electrical conductivity of Ni(II) polymeric complexes. The crystal structure of the complex [Ni(L1)Cl-2]center dot EtOH were L1=1,2-bis(2 '-pyridylbenzyleneimino)benzene

The preparation and the characterization of nickel(II) complexes with the n eutral, N, non-macrocyclic Schiff base ligands L1 = 1,2-bis-(2'-p yridylben zyleneimino) benzene and L2 = 1,2-bis(2'-pyridylethyleneimino)benzene, of f ormulae Ni(LX)Cl-2 are reported. The structure of the complex, [Ni(L1)Cl-2] . EtOH, has been determined by X-ray diffraction methods. The nickel atom has a six coordinate NiN4Cl2 chromophore with distorted octahedral coordina tion, while the ligand L acts as a tetradentate chelate, with the ligated a toms in an essentially planar arrangement around the metal and the remainin g axial coordination sites occupied by chloro ligands. The reactions of the above complexes and that of Ni(L3)Cl-2 with 1,4-phenyldiisocyanide (phdi) formed polymeric compounds of the type [(LX)Ni(phdi)](n)Cl-2n which have be en characterized by elemental analysis, magnetic susceptibility measurement s, IR and UV-Vis spectroscopic techniques. The solid state electrical condu ctivity of the polymeric complexes was approximately 10(-7)(Omega . m)(-1) which further increased by partial oxidation with I-2. (C) 1998 Elsevier Sc ience Ltd. All rights reserved.