| abstract |
A novel liquid crystalline compound having a large dielectric anisotropy value, a small change in the threshold voltage depending upon temperatures, and an improved solubility in other liquid crystal materials at low temperatures, and a liquid crystal composition containing the compound are provided, which liquid crystalline compound is expressed by the formula (1) <IMAGE> (I) wherein R is H or an alkyl group of 1 to 10C; l is an integer of 1 to 9; m, n and o are each independently 0 or 1; A1, A2 and A3 are each independently trans-1,4-cyclohexylene group, 1,4-phenylene group, one or more H atoms on the ring of which group may be replaced by F, or the like group; Z1, Z2 and Z3 are each independently -COO-, etc., but at least one of them is -COO-; X is CF3, etc.; and Y1, and Y2 are each independently H or F.\! |