Synthesis and structures of ruthenium(III) complexes with 4-R-2-((2-(pyridin-2-yl)hydrazono)methyl)phenol

Abstract

The ruthenium(III) complexes [Ru(L n) 2]ClO 4 with 4-R-2-((2-(pyridin-2-yl)hydrazono)methyl)phenol (HL n; R = H, Cl, Br, Me and OMe) have been synthesized. Microanalysis, magnetic susceptibility and various spectroscopic (IR, UV-Vis and EPR) measurements have been used for the characterization of these complexes. The molecular structures of all the complexes, except for the complex where R = Br, have been confirmed by a single crystal X-ray diffraction study. The metal centers in these complex cations are in a distorted octahedral N 4O 2 environment formed by the pyridine-N, the imine-N and the phenolate-O donor (L n) - ligands. Intermolecular hydrogen-bonding assisted supramolecular structures assembled by the solvated complexes range from dimeric to one-dimensional chain to two-dimensional sheet structures. © 2011 Elsevier Ltd. All rights reserved.