Ethyne derivatives as a component of liquid crystal phases
AssigneeMerck Patent GmbH
InventorsVolker Reiffenrath, Eike Poetsch, Joachim Krause, Georg Weber
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Abstract
Ethyne derivatives of the formula I R.sup.1 --(A.sup.1 --Z.sup.1).sub.m --A.sup.3 --C.tbd.C--A.sup.4 -(Z.sup.2 -A.sup.2).sub.n --R.sup.2 I wherein R.sup.1, A.sup.1, Z.sup.1 m, A.sup.3, A.sup.4, Z.sup.2, A.sup.2, n and R.sup.2 have the meaning given in claim 1 are suitable as components of liquid crystal phases.
Claims6
An ethyne derivative of Formula I ##STR4## wherein R.sup.1 and R.sup.2 in each case independently of one another are straight-chain alkyl, alkoxy, or oxaalkyl having 1 to 15 C atoms;
- m is 1 or 1;
- and
- A.sup.3 and A.sup.4 are each independently 1,4-phenylene, pyridine-2,5-diyl, or pyrimidine-2,5-diyl,
- with the proviso that only one of the groups A.sup.3 and A.sup.4 is pyridine2,5-diyl or pyrimidine-2,5-diyl.
##STR5## , a compound of claim 5.
A liquid crystal phase containing at least two liquid crystal components, wherein at least one component is a compound of Formula i according to claim 7
Dependencies are inferred from the claim text.