Halogen-containing heterocyclic compound and liquid crystal comp

Details Halogen-containing heterocyclic compound and liquid crystal comp Halogen-containing heterocyclic compound and liquid crystal comp

1988-06-06

1989-09-12

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 2522995, 350350R, 350350S, 546339, 546346, C02F 113, C09K 1934, C07D24136

Patent

active

048657638

ABSTRACT:
A novel liquid crystalline, halogen-containing heterocyclic compound having a characteristic that even when its S.sub.c * phase is supercooled, no other smectic phases appear, and a liquid crystal composition containing the same are provided, which compound is expressed by the formula ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group of 2 to 18 carbon atoms; X represents --N.dbd. or --CH.dbd.; Y represents F or Cl; n represents an integer of 0 to 10; and a symbol * represents an asymmetric carbon atom.

REFERENCES:
patent: 4484220 (1987-08-01), Shiomozaki et al.
patent: 4684477 (1987-08-01), Sugimori et al.
patent: 4725688 (1988-02-01), Taguchi et al.
patent: 4752413 (1988-06-01), Inoue et al.
patent: 4765924 (1988-08-01), Inoue et al.
patent: 4781857 (1988-11-01), Inoue et al.
patent: 4784792 (1988-11-01), Inoue et al.
Gray, G. W. et al., Liquid Crystals and Plastic Crystals, vol. II, John Wiley & Sons, Inc., pp. 142-143 (1974).

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