Liquid crystal 4-(4'-cyanodiphenyl) esters of trans-4"-N-alkyloc

Details Liquid crystal 4-(4'-cyanodiphenyl) esters of trans-4"-N-alkyloc Liquid crystal 4-(4'-cyanodiphenyl) esters of trans-4"-N-alkyloc

1985-01-25

1986-08-12

Gron, Teddy S.

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

Organic compounds

Nitriles

2522996, 25229963, 25229965, 25229966, 350350R, G02F 113, C09K 334, C07C12148, C07C12160

Patent

active

046055207

ABSTRACT:
Liquid crystal 4-(4'-cyanodiphenyl) esters of trans-4"-n-alkylcyclohex-2-enecarboxylic acids of the general formula: ##STR1## wherein R is a CH.sub.3 --C.sub.7 H.sub.15 radical of a normal structure. These compounds have low temperatures of the formation of the liquid crystal phase (42.degree.-50.degree. C.), a small heat of transition from the crystal phase into the liquid crystal phase (.DELTA.H=2.7-3.2 kCal/mol), a wide range of the existence of the liquid crystal phase (140.degree. C.).

REFERENCES:
patent: 3951846 (1976-04-01), Gavrilovic
patent: 4013582 (1977-03-01), Gavrilovic
patent: 4029594 (1977-06-01), Gavrilovic et al.
patent: 4113647 (1978-09-01), Coates et al.
patent: 4207252 (1980-06-01), Sato et al.
patent: 4211666 (1980-07-01), Inufai et al.
patent: 4261651 (1981-04-01), Gray et al.
patent: 4261652 (1981-04-01), Gray et al.
patent: 4505837 (1985-03-01), Romer et al.
Gray, G. W., et al., Mol. Cryst. Liq. Cryst., vol. 53, pp. 147-166, (1979).

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