| abstract |
Optically active compounds for use in chiral liquid crystal compositions have the formula:n in which R¹ is a straight or branched alkyl, alkoxy, alkanoyl, alkanoyloxy, alkoxycarbonyl or alkoxycarbonyloxy group each containing up to 15 carbon atoms, a hydrogen or halogen atom or a cyano group; n n R² is an optically active group having from 2 to 20 skeletal atoms in its chain;n (wherein X is hydrogen or halogen atom or a cyano group): n nℓ is an integer of from 1 to 10; n n m is o or 1; n nand * indicates an asymmetric carbon atom. |