Optically active compound, liquid crystal compositions containing the optically active compound, and liquid crystal display device

摘要

[I] An optically active compound of the formula (1), <IMAGE> (1) wherein R1 is a linear alkyl group, each of X1 and X2 is a hydrogen atom or one of X1 and X2 is a hydrogen atom and the other is a fluorine atom, each of Y1 and Y2 is a hydrogen atom or one of Y1 and Y2 is a hydrogen atom and the other is a fluorine atom, m is an integer of 3 to 10, and C* is an asymmetric carbon atom, [II] an anti-ferroelectric liquid crystal composition consisting essentially of the optically active compound of the above formula (1) and a compound of the formula (2), <IMAGE> (2) and [III] a ferrielectric liquid crystal composition consisting essentially of the optically active compound of the formula (1) and a compound of the formula (3). <IMAGE> (3)