Preparation,characterization and crystal structures of two transition metal complexes derived from diSchiff base ligand of N,N′-bis-［(1benzimidazo2yl)ethylidene］diethylenetriamine
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：The reactions of ZnCl2 and CdCl2·2.5H2O with diSchiff base ligand of N,N′bis［(1benzimidazo2yl)ethylidene］diethylenetriamine (LA) were investigated in presence of NaClO4 in ethanol. The fivecoordinated complex of ［ZnLBCl］·ClO4 (1) and the sixcoordinated complex of ［CdLACl］·ClO4·H2O (2) were prepared by the reactions of LAwith ZnCl2. LB of N［(1benzimidazo2yl)ethylidene］diethylenetriamine was a tetradentate monoSchiff base ligand prepared by the hydrolysis of the precursor diSchiff base ligand of LA. Xray diffraction analysis reveals that the transition atoms in two complexes are chelated by different multidentate ligands of LA and LB with terminal chloride atom to exhibit slightly distorted trigonalbipyramid and octahedron coordination sphere,respectively. The noncoordinating N—H groups of benzimidazoyl and the lattice water form strong hydrogen bonding interactions with the counter anions to lead to great difference of crystal packing.
2016, Vol. 37 
