2-[5-(3-Cyanophenyl)-2-methyl-3-thienyl]-1-(2,5-dimethyl-3-thienyl)-3,3,4,4,5,5-hexafluorocyclopent-1-ene: a new photochromic diarylethene compound

Abstract

Key indicatorsSingle-crystal X-ray study T = 294 K Mean (C-C) = 0.006 Å Disorder in main residue R factor = 0.044 wR factor = 0.140 Data-to-parameter ratio = 11.4For details of how these key indicators were automatically derived from the article, see

3-(4-{3,3,4,4,5,5-Hexafluoro-2-[5-(3-methoxyphenyl)-2-methyl-3-thienyl]cyclopent-1-enyl}-5-methyl-2-thienyl)benzonitrile

“…The residue was purified by column chromatography on silica gel (hexane) to give (2-methyl-5-(3-methoxylphenyl)thiophene)perfluorocyclopent-1ene, (2) (4.53 g, 11.3 mmol). Finally, to a stirred THF solution (50 ml) of 3-bromo-5-(3-cyanophenyl)-2-methylthiophene, (3) (Pu et al, 2006) (2.6 g, 9.6 mmol), an n-BuLi/hexane solution (3.8 ml, 2.5 M, 9.6 mmol) was slowly added in at 195 K under a nitrogen atmosphere. After 30 min, compound (2) (3.8 g, 9.6 mmol) was added and the mixture was stirred for 2 h at this temperature.…”