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US4536321A Fluorobenzene derivatives and liquid crystal compositions containing the same 失效
含氟苯衍生物和含有它们的液晶组合物

Fluorobenzene derivatives and liquid crystal compositions containing the
same
摘要:
Novel liquid crystal compounds having a large positive dielectric anisotropy value and also a low viscosity and a good stability to heat, light, air and water, and liquid crystal compositions containing the same are provided, which compounds are fluorobenzene derivatives expressed by the general formula ##STR1## wherein n represents 1 or 2, X represents CN or COCH.sub.3, and R represents hydrogen atom or an alkyl group or an alkoxy group each of 1 to 15 carbon atoms.
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