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

1987-01-14

1988-08-23

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 25229901, 350350R, 350350S, 544335, 546339, 546346, G02F 113, C09K 1934, C07D23902, C07D21170

Patent

active

047659246

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: 4684220 (1987-08-01), Shionozaki et al.
patent: 4684477 (1987-08-01), Sugimori et al.
Gray, G. W., et al., Liquid Crystals & Plastic Crystals, vol. 1, John Wiley & Sons, In., pp. 142-143 (1974).

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