CHIRALE ODER ACHIRALE RINGVERBINDUNGEN

摘要

Chiral or achiral cyclic compounds of formula R<1>-(A<1>-Z<1>)m-A<2>-Q<1>-C*R DEG CF3-X, wherein R<1> denotes alkyl or perfluoralkyl which can be interrupted by O- and/or -CO- and/or -CO-O- and/or -CH=CH- and/or -CH halogen- and/or -CHCN- and/or -O-CO-CH halogen- and/or -CO-O-CHCN-, F, Cl, Br, CN or -Q<1>-C*R DEG CF3-X; A<1> and A<2> denote unsubstituted 1,4-phenylene or 1,4-phenylene substituted with one or two F and/or CH3 and/or CN, wherein one or two CH groups can also be replaced by 1,4-cyclohexane, wherein one or two non-neighbouring CH2 groups can be replaced by O and/or S, 1-(4-) cyano-1,4-cyclohexylene, piperidin-1,4-diyl, 1,4-bicyclo(2,2,2)-octylen, 1,3,4-thiadiazol-2,5-diyl naphthalen-2,6-diyl, decahydronaphthalen-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl; Z<1> denotes -CO-O-, -O-CO-, -CH2CH2-, -OCH2-, -CH2O, -C=C-, or a single bond; X denotes H or CH3; C* denotes a carbon atom bonded to four different substituents; or m = 1, 2 or 3; Q<1> denotes -O-, -O-CO-, -CO-O- or a single bond, and in the case in which at least one of the rings A<1> and A<2> is replaced by 1,4-phenylene substituted by one or two F atoms or A<1> is unsubstituted 1,4-phenylene, wherein one CH group is replaced by N, also denotes -O-(CH2)n-, -O-CO-(CH2)n- or -CO-O-(CH2)n, where n = 1, 2, 3 or 4; R DEG is alkyl different from X, or, if Q is a single bond, alkoxy or alkanoyloxy. Said compounds can be used as chirally oriented smectic liquid crystal phases.