Patent ID: 6210761
Filing Date: 2001-04-03
Classification: C07C,C09K

Abstract:
A liquid crystalline compound expressed by the general formula (1) ##STR62##wherein Ra and Rb each independently represent a straight chain or branched alkyl group having 1 to 20 carbon atoms in which alkyl group any non-adjacent methylene group (--CH.sub.2 --) may be replaced by oxygen atom; Y.sub.1, Y.sub.2, Y.sub.3, Y.sub.4, Y.sub.5 and Y.sub.6 each independently represent hydrogen atom or fluorine atom provided that at least three of Y.sub.1, Y.sub.2, Y.sub.3, Y.sub.4, Y.sub.5 and Y.sub.6 represent fluorine atom; Z.sub.1 and Z.sub.2 independently represent --(CH.sub.2).sub.2 --, --(CH.sub.2).sub.4 --, --CH.sub.2 O--, --(CH.sub.2).sub.3 O-- or single bond provided that in no case do Z.sub.1 and Z.sub.2 each simultaneously represent single bond; and any atom which constitutes the compound may be replaced by its isotope.