Tetrakis(2,2′-bipyridyl)dichloridodi-μ3-hydroxido-di-μ2-hydroxido-tetracopper(II) dinitrate hexahydrate

Abstract

The tetranuclear copper(II) title complex, [Cu4Cl2(OH)4(C10H8N2)4](NO3)2·6H2O, has a crystallographically imposed centre of symmetry. The metal atoms display a distorted tetragonal-pyramidal coordination geometry, and are linked by two μ2- and two μ3-hydroxo groups, assuming a chair-like conformation for the Cu4O2 core. In the crystal, the complex molecules are linked into a three-dimensional network by intermolecular O—H...O, O—H...Cl, C—H...O and C—H...Cl hydrogen bonds and π–π stacking interactions with centroid–centroid separations of 3.724 (2) and 3.767 (3) Å.