| abstract |
PCT No. PCT/EP91/02400 Sec. 371 Date Sep. 3, 1992 Sec. 102(e) Date Sep. 3, 1992 PCT Filed Dec. 13, 1991 PCT Pub. No. WO92/12218 PCT Pub. Date Jul. 23, 1992.A liquid-crystalline bispyrimidinylcyclohexane of the formula (I) <IMAGE> (I) in which: R1 and R2 are identical or different and are, for example, straight-chain or branched alkyl, X1 and X2 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. |