Acta Cryst. (2008). E64, o2311 [ doi:10.1107/S1600536808036453 ]
Abstract: The title compound, C24H20F6OS2, exhibiting photochromic behaviour, has thienyl and benzothienyl substituents attached to the double-bond C atoms of the envelope-shaped cyclopentene ring. The mean planes of aromatic systems form dihedral angles of 43.0 (1) (thienyl) and 73.8 (1)° (benzothienyl) with the mean plane of the C-C=C-C portion of the cyclopentene ring. This conformation avoids steric hindrance between the n-butyl and ethyl substituents. The formyl substituent of the thienyl group, as well as the ethyl substituent of the benzothienyl group, are disordered [occupancies of 0.788 (17):0.212 (17) and 0.64 (5):0.36 (5), respectively].
Copyright © International Union of Crystallography