发明授权
US4729847A Optically active liquid crystal compound having methyleneoxy group and composition containing same 失效
具有亚甲基氧基的光学活性液晶化合物和含有它们的组合物

Optically active liquid crystal compound having methyleneoxy group and
composition containing same
摘要:
A novel, superior, optically active liquid crystal compound exhibiting a smectic C* phase, and a liquid crystal composition containing the same are provided, which compound is expressed by the formula ##STR1## wherein X represents --CH.sub.2 O-- or --OCH.sub.2 --; Y represents --COO-- or --OCO--; and either one of R.sup.1 or R.sup.2 represents an optically active alkyl group, alkoxy group or alkoxycarbonyl group and the other represents a non-optically-active alkyl group or alkoxy group each of 4 to 18 carbon atoms.
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