| abstract |
A liquid crystalline compound and a liquid crystal composition containing the compound usable for liquid crystal display devices are provided, which liquid crystalline compound is expressed by the formula n n R.sup.1 --A.sup.1 --B.sup.1 --A.sup.2 --B.sup.2 --A.sup.3.sub.n n n (CH 2 ) m CH═CF 2 n wherein R 1 is H or 1-20C alkyl or alkenyl wherein one --CH 2 --group or two --CH 2 -- groups not adjacent to each other may be substituted by --O--; the position and number of the double bond may be optionally chosen; A 1 , A 2 and A 3 each are ##STR1## and the H of the ##STR2## may be substituted by F, Cl or methyl; B 1 and B 2 each are --CH 2 CH 2 --, --CH 2 O--, --OCH 2 -- or a single bond; n is 0 or 1; and m is 0-20. |