Ferroelectric liquid crystal compositions containing halogenated cores and chiral halogenated cores and chiral haloalkoxy tail units

摘要

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:PP ______________________________________ PP2S-halo 2R-halo PP1S-methyl-2S-halo 1R- methyl-2R-halo PP 1S-methyl-2R-halo 1R-methyl-2S-halo PP2S,3S-dihalo 2R,3R- dihalo PP2R,3S-dihalo 2S, 3R-dihalo PP1R- methyl-2R,3R-dihalo PP 1S- methyl-2S,3S-dihalo P P1R-methyl-2R,3S-dihalo P P 1S-methyl-2S,3R- dihalo PP1R-methyl-2R,3S-dihalo PP 1S- methyl-2S,3R-dihalo PP1R-methyl-2R,3S- dihalo P P 1S-methyl-2S,3R-dihalo PP ______________________________________ PP