A liquid-crystalline bispyrimidinylcyclohexane of the formula (I) ##STR1## in which: R.sup.1 and R.sup.2 are identical or different and are, for example, straight-chain or branched alkyl, X.sup.1 and X.sup.2 are identical or different and are H, F, Cl or CN, is particularly suitable as a component of liquid-crystal mixtures. In nematic and smectic liquid-crystal mixtures, these compounds result in low melting points and broad phase ranges.
式(I)中的液晶双
嘧啶基
环己烷化合物,其中:R.sup.1和R.sup.2相同或不同,例如是直链或支链烷基;X.sup.1和X.sup.2相同或不同,可以是H、F、Cl或CN,特别适用于液晶混合物的组分。在向列相和烯烃相液晶混合物中,这些化合物具有低熔点和广泛的相区间。