Novel liquid crystal compounds having broader and preferable liquid crystal temperature ranges are provided. Their optically active isomers form a cholesteric liquid crystal, while their racemates form a nematic liquid crystal. The compounds are trans-4"-alkylcyclohexyl esters of 4'-(2-methyl-butyl)-4-biphenylcarboxylic acid expressed by the general formula ##STR1## wherein R represents a straight chain alkyl group having 1 to 10 carbon atoms, and the symbol * represents an asymmetric carbon atom.
提供了具有更广泛和更可取的液晶温度范围的新型液晶化合物。它们的光学活性异构体形成胆甾液晶,而它们的消旋体形成向列液晶。这些化合物是4'-(2-甲基丁基)-4-
联苯基
甲酸的反式4"-烷基环己基酯,表示为一般公式##STR1##其中R代表具有1到10个碳原子的直链烷基基团,符号*代表一个不对称的碳原子。