Liquid crystalline naphthalene derivatives

Details Liquid crystalline naphthalene derivatives Liquid crystalline naphthalene derivatives

1980-12-05

1983-05-31

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522995, 260463, 260465C, 260465D, 260465G, 2604653, 350350R, 560141, 568632, 568929, 568941, 568942, 570129, 570130, 570183, 570187, 585 20, 585 21, C09K 334, G02F 113, C07C 4320, C07C 1348, C07C 2336, C07C 2518, C07C 6914, C07C 6924

Patent

active

043860079

ABSTRACT:
Liquid crystalline naphthalene derivatives of the formula ##STR1## wherein ring A is 1,4-phenylene, trans-1,4-cyclohexylene or 1,4-cyclohex-1-enylene and ring system BC is 2,6-naphthylene, 3,4-dihydro-2,6-naphthylene or 1,2,3,4-tetrahydro-2,6-naphthylene, with the proviso that A is not 1,4-phenylene when BC is 2,6-naphthylene; and R.sub.1 and R.sub.2, which are identical or different, are each alkyl of up to 8 C atoms or, when the rings to which they are bonded are aromatic, also can be alkoxy, alkanoyloxy or alkoxycarbonyloxy having up to 8 C atoms in each case; or one of R.sub.1 and R.sub.2 also can be CN, halogen, CF.sub.3 or NO.sub.2 are valuable components for liquid crystalline dielectrics.

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Gray, G. W., et al., Liquid Crystals & Plastic Crystals, vol. 1, Ellis Horwood Ltd., England, pp. 136-137.
Gray, G. W., et al., Mol. Cryst. Liq. Cryst., vol. 53, pp. 147-166 (1979).
Coates, D., et al., Mol. Cryst. Liq. Cryst., vol. 37, pp. 249-262, (1976).
Lauk, U., et al., Helvetica, Chimica Acta, vol. 64, pp. 1847-1848 (1981).

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