Mesomorphic compound, liquid crystal composition containing same

Details Mesomorphic compound, liquid crystal composition containing same Mesomorphic compound, liquid crystal composition containing same

1990-08-08

1992-02-25

Maples, John S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 548136, 359104, C09K 1934, C07D 8514, G02F 113

Patent

active

050911090

ABSTRACT:
A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 respectively denote an alkyl group having 1-16 carbon atoms capable of having a substituent; X.sub.1, X.sub.2 and X.sub.3 respectively denote a single bond, --O--, ##STR2## A.sub.1 and A.sub.2 respectively ##STR3## wherein X.sub.4 and X.sub.5 respectively denote hydrogen, fluorine, chlorine, bromine, --CH.sub.3, --CN or --CF.sub.3 with proviso that X.sub.1 always denotes a single bond when A.sub.1 denotes a single bond; and n is 0 or 1.

REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
CA: 69002y, "2,5 diaryl-1,3.4 thiadiazyoles", vol. 68, 1968, p. 69002, author: Siegenrist.
CA: 94: 174933g, "Liquid crystalline, 1,3.4 thiadiazoles," Hauschild et al., vol. 94, 1981, p. 174993-4 (American Chemical Society).
Helv. Chim. Acta., vol. 39, No. 59 (1956) 504:13.
Helv. Chim. Acta., vol. 40, No. 249 (1957) 2428:33.
Appl. Phys. Lett., vol. 18, No. 4 (Feb. 1971) 127:28.
R. Tschesche and W. Fuhrer. Chem. Ber., vol. III (1978) 3502:05.
P. B. Rasmussen et al., Bull. Soc. Chim. de France, No. 1 (1985) 62:65.

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