2-[2-(N,N-Dimethylamino)phenyl]-3,3,4,4,5,5-hexafluoro-1-(2-methyl-5-phenyl-3-thienyl)cyclopent-1-ene

The title compound, C24H19F6NS, is a new hybrid diarylethene derivative with a 3-thienyl and a six-membered aryl unit as the substituents. In the crystal structure, the F atoms of the central hexafluorocyclopentene ring are disordered, with site occupancies of 0.641 (3) and 0.359 (3). The molecule adopts a photoactive antiparallel conformation. The distance between the two reactive C atoms, between which a new C-C bond can be formed upon UV irradiation, is 3.504 (5) angstrom. The dihedral angle between the thienyl ring and the adjacent phenyl ring is 12.4 (2)degrees. The dihedral angle between the central cyclopentene ring and the thienyl ring is 46.6 (7)degrees, and that between the central cyclopentene ring and the dimethylaminophenyl ring is 49.7 (4)degrees.