Nematic liquid crystal compound of four ring systems

Details Nematic liquid crystal compound of four ring systems Nematic liquid crystal compound of four ring systems

1988-05-18

1989-03-21

Gron, Teddy S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

2522295, 25229963, 350350R, 350350S, C02F 113, C09K 1930, C07C 2518

Patent

active

048145238

ABSTRACT:
A tetracyclic nematic liquid crystal compound of the following formula: ##STR1## wherein R represents a straight-chained alkyl group carrying one to seven carbon atoms; and ##STR2## has a trans (equatorial-equatorial) configuration; is disclosed. This compound has a high N-I transition temperature and a low S-N transition temperature and is highly useful as an electro-optical display material.

REFERENCES:
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patent: 4439340 (1984-03-01), Kojoma et al.
patent: 4472293 (1984-09-01), Sugimori et al.
patent: 4477369 (1984-10-01), Sugimori et al.
patent: 4502974 (1985-03-01), Sugimori et al.
patent: 4545922 (1985-10-01), Elbenschime et al.
patent: 4683078 (1987-07-01), Sugimori et al.

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