Liquid crystalline compounds having an optically active .gamma.-lactone ring of the general formula (A): ##STR1## wherein R.sup.1 is a group selected from the class consisting of ##STR2## n and e are each independently 0 or 1, R.sup.3 is an alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms, said alkyl and alkenyl groups having each optionally one or more asymmetric carbon atoms, X and Y are each hydrogen atom, a halogen atom or a cyano group, R.sup.2 is an alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms, said alkyl and alkenyl groups having each optionally one or more asymmetric carbon atoms, and * means an asymmetric carbon atom, a liquid crystal composition Containing the same and an element for opto-electronics devices comprising the liquid crystal composition.
具有光学活性.γ.-内酯环的液晶化合物的一般
化学式(A)如下:其中R.sup.1是从以下类中选择的一个基团:n和e分别独立为0或1,R.sup.3是具有1至15个碳原子的烷基基团或具有2至15个碳原子的烯基基团,所述烷基和烯基基团每个可选择地具有一个或多个不对称碳原子,X和Y分别是氢原子、卤素原子或
氰基,R.sup.2是具有1至15个碳原子的烷基基团或具有2至15个碳原子的烯基基团,所述烷基和烯基基团每个可选择地具有一个或多个不对称碳原子,*表示一个不对称碳原子,液晶组合物包含相同的化合物和包含该液晶组合物的光电子器件元素。