Hexa-μ-chlorido-μ4-oxido-tetrakis({1-[(pyridin-2-yl)methyl]-1H-benzimidazole-κN3}copper(II))

Abstract

The title tetranuclear complex, [Cu4Cl6O(C13H11N3)4], features a tetrahedral arrangement of copper(II) ions bonded to the central O atom (site symmetry overline{4}). Each of the six edges of the Cu4 tetrahedron is bridged by a chloride ion (one of which has site symmetry 2), so that each copper ion is linked to the other three metal ions through the central O atom and through three separate chloride-ion bridges. The fifth coordination position, located on the central Cu—O axis on the outside of the cluster, is occupied by an N atom of the monodentate 1-(pyridin-2-ylmethyl)-1H-benzimidazole ligand. The resulting coordination geometry of the metal ion is a distorted trigonal bipyramid with the O and N atoms in the axial positions. The dihedral angle between the benzimidazole ring system and the pendant pyridine ring is 61.0 (2)°.