Liquid-crystalline halogen compounds, process for their preparat

Details Liquid-crystalline halogen compounds, process for their preparat Liquid-crystalline halogen compounds, process for their preparat

1982-09-15

1984-12-25

Gron, Teddy S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260465G, 2522995, 25229963, 25229966, 350350R, 350350S, 570129, 570182, 568642, 568643, G02F 113, C09K 334, C07C 2518, C07C 4322, C07C12164

Patent

active

044903057

ABSTRACT:
Liquid-crystalline halogen compounds of the formula ##STR1## wherein the ring A is 1,4-phenylene or trans-1,4-cyclohexylene; R.sub.1 is alkyl or alkoxy each of 1 to 12 carbon atoms or, when A is 1,4-phenylene, is also cyano; R.sub.2 is alkyl or alkoxy each of 1 to 12 carbon atoms or, when A is 1,4-cyclohexylene, is also chlorine or bromine; and X is fluorine, chlorine or hydrogen; with the proviso that at least one of the substituents R.sub.2 and X is a halogen atom are valuable components in liquid-crystalline dielectrics.

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