Cyclohexanecarbonitriles

Details Cyclohexanecarbonitriles Cyclohexanecarbonitriles

1985-06-26

1986-12-16

Torrence, Dolph H.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

350350R, 558426, 558431, C09K 334, C07C12146

Patent

active

046295810

ABSTRACT:
Compounds of the formula ##STR1## wherein R.sup.1 is hydrogen or straight-chain alkyl; R.sup.2 is --CN, --R, --COR, --COOR or when R.sup.2 is positioned on an aromatic ring R.sup.2 also can be --OR, --OOCR or --F; R is alkyl; A is a group with 1 to 4 six-membered rings, these rings being linked directly with one another and with ring B in each case via a single covalent bond or being linked at one or two positions also via --COO--, --OOC-- or --CH.sub.2 CH.sub.2 --; the six-membered rings in A and ring B each are 1,4-phenylene or trans-1,4-cyclohexylene or one of these rings also is trans-2,5-disubstituted m-dioxane, 2,5-disubstituted pyrimidine or 3,6-disubstituted pyridazine, with the proviso that a maximum of two adjacent trans-1,4-cyclohexylene rings are linked directly via a single covalent bond; and m is the integer 2, or when ring B is trans-1,4-cyclohexylene or trans-2,5-disubstituted m-dioxane, m also can be the integer 0,
their manufacture, liquid crystalline mixtures which contain these compounds as well as the use of these compounds for electro-optical purposes are described.
Additionally, compounds of the formula ##STR2## wherein R.sup.8 is straight-chain C.sub.1 -C.sub.12 alkyl, their manufacture, liquid crystalline mixtures which contain these compounds and their use for electro-optical purposes are described.

REFERENCES:
patent: 4510069 (1985-04-01), Eidenschink et al.
R. Eidenschink et al., 4. Freiburger Arbeitstagung Flussigkristalle, Apr. 3, 1984.

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