Liquid crystal compounds and liquid crystal compositions containing them

摘要

A liquid crystal compound represented by the following formula; <IMAGE> wherein R1 and R2 each represents an alkyl group having 3-20 carbon atoms, and X represents a group <IMAGE> or -O-, or a single bond, and a liquid crystal composition exhibiting optically tristable states comprising the liquid crystal compound represented by the above formula and an antiferroelectric liquid crystal compound.