Cyclohexylphenyl derivatives of the formula ##STR1## wherein X is --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --O--, --CH.sub.2 --S--, --O--CH.sub.2 -- or --S--CH.sub.2 --; R.sub.1 is alkyl of up to 8 carbon atoms; R.sub.2 is alkyl or alkoxy each of up to 8 carbon atoms, fluorine, chlorine, bromine or cyano; and R.sub.3 and R.sub.4 are both hydrogen or one is hydrogen and the other is fluorine, chlorine, bromine or cyano, with the proviso that R.sub.3 and R.sub.4 are both hydrogen when X is --CH.sub.2 --CH.sub.2 -- or R.sub.2 is fluorine, chlorine, bromine or cyano, are valuable liquid crystalline compounds.
Cyclohexylphenyl衍
生物的公式为##STR1##其中X是--CH.sub.2--CH.sub.2--, --CH.sub.2--O--, --CH.sub.2--S--, --O--CH.sub.2--或--S--CH.sub.2--; R.sub.1是最多8个碳原子的烷基; R.sub.2是最多8个碳原子的烷基或烷氧基,
氟,
氯,
溴或
氰; R.sub.3和R.sub.4都是氢,或其中一个是氢,另一个是
氟,
氯,
溴或
氰,但是当X为--CH.sub.2--CH.sub.2--或R.sub.2为
氟,
氯,
溴或
氰时,R.sub.3和R.sub.4都是氢,是有价值的液晶化合物。