Ferroelectric liquid crystal compositions containing halogenated

Details Ferroelectric liquid crystal compositions containing halogenated Ferroelectric liquid crystal compositions containing halogenated

1990-07-20

1993-01-19

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 544245, 544335, 546339, 546346, C09K 1734, C07D23902, C07D21324

Patent

active

051805200

ABSTRACT:
The subject application discloses chiral nonracemic compositions of the general formula: ##STR1## wherein R.sub.1 is an achiral tail of two to sixteen carbons; Ar is an achiral FLC core of at least two rings; * denotes a chiral or potentially chiral carbon; Q is H or a methyl group; X and Z are halides and Y is H or a halide; and R.sub.2 is one to ten carbon atoms. The --O--C*HQ--C*HX--C*HY-- segment comprises the chiral proximal segment of the chiral tail. Z can be an ortho halide alone, or ortho and meta halides on adjacent carbons on the aromatic ring of the core adjacent to the proximal segment. R.sub.2 is the distal segment of the chiral tail. The proximal segment is selected from the diastereomers and enantiomers:

REFERENCES:
patent: 4556727 (1985-12-01), Walba et al.
patent: 4695650 (1987-09-01), Walba et al.
patent: 4725688 (1988-02-01), Taguchi et al.
patent: 4728458 (1988-03-01), Higuchi et al.
patent: 4777280 (1988-10-01), Eidman et al.
patent: 4781857 (1988-01-01), Inoue et al.
patent: 4795587 (1989-01-01), Ohno et al.
patent: 4798680 (1989-01-01), Nohira et al.
Wand et al. (1991) Ferroelectrics 121:219-223.
Furukawa et al. (1988) Ferroelectrics 85:451-459.
Chemical Abstract No. 109:201686w (p. 795).

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