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 <IMAGE> wherein X represents -CH2O- or -OCH2-; Y represents -COO- or -OCO-; and either one of R1 or R2 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.