Polynuclear nickel(II) complexes with salicylaldimine derivative ligands

The reaction of pentadentate salicylaldimine ligand 2-((2-(2-(2-hydroxybenzylideneamino)ethylthio) ethylimino) methyl) phenol (H2L) and its related hydrogenated derivative 2-((2-(2-(2-hydroxybenzylamino)ethylthio)ethylamino)methyl)phenol (H4L1) with hydrated nitrate and perchlorate nickel(II) salts afforded polynuclear metal complexes. These complexes were characterized by elemental analysis, IR and UV-Vis spectroscopy, molar conductance and variable temperature magnetic measurements. Single crystal X-ray diffraction of [(NiL)(2)]center dot CH3OH center dot 4H(2)O (1) and [Ni-3(H2L1)(2)(NO3)(2)] (3) complexes has revealed the presence of an octahedral coordination geometry around the nickel ion. The magnetic data indicate that a moderate antiferromagnetic interaction is present in complexes 1 and 3. (C) 2012 Elsevier B. V. All rights reserved.