1,2-Bis[5-(4-cyano-phen-yl)-2-methyl-3-thien-yl]-3,3,4,4,5, 5-hexa-fluoro-cyclo-pent-1-ene: A photochromic diaryl-ethene compound

Abstract

The mol-ecules of the title compound, C29H16F6N2S2, a photochromic dithienylethene with 4-cyano-phenyl substituents, adopt an anti-parallel arrangement that is reponsible for photoactivity. The mol-ecule lies on a twofold rotation axis. The dihedral angle between the nearly planar cyclo-pentenyl and heteroaryl rings is 142.5 (3)°, and that between the heteroaryl and benzene rings is 22.4 (3)°. The distance between the heteroaryl rings of adjacent mol-ecules is 3.601 (2) Å, indicating a π-π interaction.