Phenylethanes

摘要

The novel compounds of the formula <IMAGE> in which R<1> is 4'-alkyl-4-biphenylyl and R<2> is trans-4-alkyl-cyclohexyl, or R<1> is trans-4-alkylcyclohexyl and R<2> is 4'-(trans-4-alkylcyclohexyl)-4-biphenylyl, or R<1> is p-alkylphenyl and R<2> is p-[2-(trans-4-alkylcyclohexyl)ethyl]phenyl, and the alkyl radicals in the substituents R<1> and R<2> are straight-chain groups having 1 to 7 carbon atoms, are particularly valuable as components in liquid-crystal mixtures and themselves have liquid-crystalline properties. They can be used for electro-optical purposes.