Tricarbonylrhenium(I) complexes with N,N'-bis(2- and 4-nitrobenzaldehyde)- 1,2-diiminoethane Schiff base ligands: Synthesis, spectroscopic and crystal structure studies

Abstract

fac-[Re(CO)3(2-nben)Cl] and fac-[Re(CO)3(4-nbzen)Cl] complexes consisting of 2-nbzen = N,N'-bis(2-nitrobenzaldehyde)-1,2- diiminoethane and 4-nbzen = N,N'-bis(4-nitrobenzaldehyde)-1,2-diiminoethane were synthesized by the reaction of Re(CO)5Cl with nbzen ligands. These complexes were characterized by physico-chemical, spectroscopic methods and X-ray crystallography. The electrochemical behavior of the two complexes was investigated by cyclic voltammetry. In the crystal structure of [Re(CO) 3(4-nbzen)Cl], the neighbouring molecules are linked together by intermolecular C-H•••Cl interactions to form 1D extended chains along the b-axis. © 2009 Springer Science+Business Media B.V.