1,2-Bis[2-<i>n</i>-butyl-5-(2,2-dicyanovinyl)-3-thienyl]-3,3,4,4,5,5-hexafluorocyclopent-1-ene: a new photochromic diarylethene compound

Zheng, Chunhong; Pu, Shouzhi; Zhang, Le; Luo, Mingbiao; Huang, De-Chao

doi:10.1107/s1600536807018909

Acta Cryst E

2007

DOI: 10.1107/s1600536807018909

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1,2-Bis[2-n-butyl-5-(2,2-dicyanovinyl)-3-thienyl]-3,3,4,4,5,5-hexafluorocyclopent-1-ene: a new photochromic diarylethene compound

Chunhong Zheng

Shouzhi Pu

Le Zhang

et al.

Abstract: In the title compound, C29H22F6N4S2, a new symmetric photochromic dithienylethene, the distance between the two reactive C atoms in the molecule is 3.475 (3) Å. The dihedral angles between the central cyclopentene ring and the two thiophene rings are 57.9 (1) and 51.2 (1)°. The molecule has no imposed crystallographic symmetry.

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1,2-Bis[5-(2,2′-dicyanovinyl)-2-n-pentyl-3-thienyl]-3,3,4,4,5,5-hexafluorocyclopent-1-ene: a new photochromic diarylethene compound

Fan

et al. 2008

Acta Cryst E

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Key indicators: single-crystal X-ray study; T = 291 K; mean (C-C) = 0.005 Å; disorder in main residue; R factor = 0.050; wR factor = 0.143; data-to-parameter ratio = 15.2.The title compound, C 31 H 26 F 6 N 4 S 2 , 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. Related literatureFor general background, see: Gilat et al. (1993Gilat et al. ( , 1995 Data collectionBruker SMART APEXII CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 1996) T min = 0.932, T max = 0.963 12153 measured reflections 5828 independent reflections 3782 reflections with I > 2sI) R int = 0.026

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1,2-Bis[5-(2,2′-dicyanovinyl)-2-n-pentyl-3-thienyl]-3,3,4,4,5,5-hexafluorocyclopent-1-ene: a new photochromic diarylethene compound

Fan

et al. 2008

Acta Cryst E

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1,2-Bis[2-n-butyl-5-(2,2-dicyanovinyl)-3-thienyl]-3,3,4,4,5,5-hexafluorocyclopent-1-ene: a new photochromic diarylethene compound

Cited by 1 publication

References 7 publications

1,2-Bis[5-(2,2′-dicyanovinyl)-2-n-pentyl-3-thienyl]-3,3,4,4,5,5-hexafluorocyclopent-1-ene: a new photochromic diarylethene compound

1,2-Bis[5-(2,2′-dicyanovinyl)-2-n-pentyl-3-thienyl]-3,3,4,4,5,5-hexafluorocyclopent-1-ene: a new photochromic diarylethene compound

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