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3,3,4,4,5,5-Hexa-fluoro-1,2-bis-[5-(2-fluoro-4'-undecyl-oxybiphenyl-4-yl)-2-methyl-3-thien-yl]cyclo-pentene.

ABSTRACT: The title compound, C(61)H(68)F(8)O(2)S(2), is a photochromic liquid crystal based on diaryl-ethene as photoswitchable unit. The F atoms connected to the benzene rings are disordered over two positions; the site-occupation factors refined to 0.830?(3)/0.170?(3). The mol-ecule adopts a photo-active anti-parallel conformation and the distance between the two reactive C atoms of the thio-phene rings is 3.448?(3)?Å. The dihedral angles between the central cyclo-pentene ring and the adjacent thio-phene rings are 43.56?(3) and 48.58?(3)°. These structural elements exhibit a suitable geometry for photochromic behaviour in the crystalline state.

SUBMITTER: Frigoli M

PROVIDER: S-EPMC2961548 | biostudies-other | 2008

REPOSITORIES: biostudies-other

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3,3,4,4,5,5-Hexa-fluoro-1,2-bis-[5-(2-fluoro-4'-undecyl-oxybiphenyl-4-yl)-2-methyl-3-thien-yl]cyclo-pentene.

Frigoli Michel M Marrot Jérôme J Mehl Georg H GH Larpent Chantal C

Acta crystallographica. Section E, Structure reports online 20080503 Pt 6

The title compound, C(61)H(68)F(8)O(2)S(2), is a photochromic liquid crystal based on diaryl-ethene as photoswitchable unit. The F atoms connected to the benzene rings are disordered over two positions; the site-occupation factors refined to 0.830 (3)/0.170 (3). The mol-ecule adopts a photo-active anti-parallel conformation and the distance between the two reactive C atoms of the thio-phene rings is 3.448 (3) Å. The dihedral angles between the central cyclo-pentene ring and the adjacent thio-phe ...[more]

PMID: 21202692

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