New entry for fluorinated carbocycles: Unprecedented 3,6-disubstituted 1,1,2,2-tetrafluorocyclohexane derivatives
| Autor: | Tomoyuki Asai, Yuji Nishi, Shigeyuki Yamada, Tsutomu Konno, Shohei Hashishita, Toshio Kubota, Takashi Ishihara, Hideaki Konishi |
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| Rok vydání: | 2017 |
| Předmět: |
Birefringence
Recrystallization (geology) Cyclohexane 010405 organic chemistry Chemistry Organic Chemistry 010402 general chemistry Photochemistry 01 natural sciences Biochemistry 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound Crystallography Cyclohexanes Environmental Chemistry Molecule Physical and Theoretical Chemistry Dielectric anisotropy |
| Zdroj: | Journal of Fluorine Chemistry. 200:47-58 |
| ISSN: | 0022-1139 |
| DOI: | 10.1016/j.jfluchem.2017.05.013 |
| Popis: | The synthetic protocols for symmetrical/unsymmetrical 3,6-disubstituted 1,1,2,2-tetrafluorocyclohexane molecules were successfully established for the first time. Some of thus obtained tetrafluorinated cyclohexanes underwent recrystallization to afford trans-configured products preferentially. One of the unsymmetrical trans-disubstituted tetrafluorocyclohexanes, trans-1-ethyl-2,2,3,3-tetrafluoro-4-[4-(trans-4-n-propylcyclohex-1-yl)phenyl]cyclohexane, was found to possess a low birefringence Δn (0.073) and a large negative dielectric anisotropy Δe (–9.4) in a binary mixture system, which were very prominent as characteristics of LC molecules in VA-mode driving LC displays. |
| Databáze: | OpenAIRE |
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