Fluoro-chloro-benzene derivatives

Details Fluoro-chloro-benzene derivatives Fluoro-chloro-benzene derivatives

1992-06-24

1996-01-09

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229966, 570129, C09K 1930, C09K 1912, C07C 1908

Patent

active

054826535

ABSTRACT:
The invention relates to fluoro-chloro-benzene derivatives of the formula I ##STR1## wherein R denotes an alkyl or halogenoalkyl residue of up to 12 C atoms wherein one or two non-adjacent CH.sub.2 groups may also be replaced by -0- and/or -HC=CH-,
the radical A is a ring of the formula (1) or (2): ##STR2## Q is a bivalent radical of the formula (1) or (2) or a single bond or--if radical A denotes trans-1,4-cyclohexylene--is also a bivalent radical of the formulae (3), (4) or (5): ##STR3## and L.degree., L.sup.1 and L.sup.2 are each independently H or F, with the proviso that at least one of L.degree., L.sup.1 and L.sup.2 present in the molecule denotes F.

REFERENCES:
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patent: 4710315 (1987-12-01), Schad et al.
patent: 4797228 (1989-01-01), Goto et al.
patent: 4846998 (1989-07-01), Pohl et al.
patent: 4886621 (1989-12-01), Sage et al.
patent: 4917819 (1990-04-01), Goto et al.

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