Molecular complexes. Part VII. The crystal and molecular structure of the 8-hydroxyquinoline chloranil complex

Abstract

The crystal and molecular structure of the 2 : 1 molecular complex of 8-hydroxyquinoline and chloranil has been determined from three-dimensional X-ray diffraction measurements. It is a plane-to-plane complex formed from dimeric 8-hydroxyquinoline molecules and chloranil molecules. The structure differs from that predicted by the overlap and orientation principle, and is remarkably similar to that of the bis-8-hydroxyquinolinatopalladium(II) chloranil molecular complex. The 8-hydroxyquinoline dimer is held together by a bifurcated hydrogen-bond system.