Received 24 December 2007
aKey Laboratory of Nuclear Resources and Environment of the Ministry of Education, East China Institute of Technology, Fuzhou 344000, People's Republic of China, and bJiangxi Key Laboratory of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, People's Republic of China
Correspondence e-mail: firstname.lastname@example.org
The title compound, C31H26F6N4S2, is a new photochromic dithienylethene with dicyanovinyl subsitituents. In the crystal structure, the molecule adopts a photoactive antiparallel conformation, with two n-pentyl groups located on opposite sides of the cyclopentene ring. The cyclopentene ring assumes an envelope conformation. The distance between the two reactive C atoms on the thiophene rings is 3.834 (7) Å. One of the n-pentyl groups is disordered over two positions; the site occupancy factors are ca 0.7 and 0.3.
For general background, see: Gilat et al. (1993, 1995); Irie (2000); Pu et al. (2003, 2005); Tian & Yang (2004); Yamaguchi & Irie (2006); Zheng et al. (2007). For related structures, see: Kobatake et al. (2004); Woodward & Hoffmann (1970).
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 1997); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: XU2397 ).
This work was financially supported by the fund of the Key Laboratory of Nuclear Resources and Environment, East China Institute of Technology, Ministry of Education, China (No. 060607).
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