Halogen-containing, optically active liquid crystal compound and liquid crystal composition containing same

摘要

A novel optically active liquid crystal compound and a liquid crystal composition containing the same are provided, which compound is expressed by the formula <IMAGE> (I) wherein R1 is alkyl or alkoxy of 4-18 C; R2 is alkyl, alkoxy, acyl or alkoxymethyl of 4-18C; but either one of R1 or R2 is an optically active group; either one of X1 or X2 is halogen atom and the other is H; m and n each are 0 or 1 and m+n is 0 or 1.