Molecular Topology of 1,2-Substituted (E) and (Z)-1,2-Di(9-anthryl)ethenes

Abstract

Single-crystal X-ray structure determinations have been carried out on six derivatives of (E)- and (Z)-1,2-di(9-anthryl) ethenes in which the central carbon-carbon double bond is additionally substituted, establishing the molecular topology in terms of the angles between the planes of the anthryl moieties and the plane of the central ethene bond. In general terms, substitution increases the torsion angle about the anthryl-ethene single bond by up to approximately 30°, so that the anthryl and ethene planes lie virtually orthogonal.