Patent ID: 6143199
Filing Date: 2000-11-07
Classification: C07C,C09K

Abstract:
A liquid-crystalline medium comprising one or more compounds of the formula I ##STR79## in which R is H or an alkyl, oxaalkyl or oxaalkenyl radical having 1-6 carbon atoms, alkyl optionally having a --CH.sub.2 -- group replaced by --CH=CH--,X is F, Cl, CN or an alkyl, alkoxy, alkenyloxy or alkenyl radical having 1 to 6 carbon atoms which is substituted by one or more fluorine atoms,L.sup.1 is F,L.sup.2 is H or F,L.sup.3 is H,Z is --CH.sub.2 CH.sub.2 --, --CH=CH--, or --C.ident.C-- [or a single bond], andn is 0, 1, 2 or 3.