This invention relates to carboxylic acid ester compounds or liquid crystal compounds represented by the following formula [A], liquid crystal compositions and liquid crystal elements using these compounds, the method of producing said liquid crystal elements, and other uses. ##STR1## wherein R represents one radical selected from the group consisting of an alkyl group having 6-18 carbon atoms, an alkoxy group having 6-18 carbon atoms, and a halogenated alkyl group having 6-18 carbon atoms, X represents --CF.sub.3 or --CH.sub.2 --CH.sub.3, m is an integral number of 1-10 when X is --CF.sub.3, and an integral number of 2-10 when X is --CH.sub.2 --CH.sub.3, and C* represents an asymmetric carbon atom.
本发明涉及由以下公式[A]表示的
羧酸酯化合物或液晶化合物、使用这些化合物的液晶组合物和液晶元件、制备液晶元件的方法以及其他用途。其中,R代表从具有6-18个碳原子的烷基、具有6-18个碳原子的烷氧基和具有6-18个碳原子的卤代烷基中选择的一个基团,X代表--CF.sub.3或--CH.sub.2--CH.sub.3,当X为--CF.sub.3时,m为1-10的整数,当X为--CH.sub.2--CH.sub.3时,m为2-10的整数,C*代表不对称碳原子。