SUBSTITUTED BENZENE DERIVATIVE, LIQUID-CRYSTAL COMPOSITION, AND LIQUID-CRYSTAL DISPLAY ELEMENT

摘要

There is provided a liquid crystalline compound having a high voltage holding ratio which has a very small degree of temperature dependence, a low threshold voltage which has a very small degree of temperature dependence, a high DELTA n, and excellent miscibility with other liquid crystal materials at low temperature; a liquid crystal composition; and a liquid crystal display element, and the liquid crystalline compound is a substituted benzene derivative represented by general formula (1), <CHEM> where, R represents a straight chain or branched alkyl group having 1 to 20 carbon atoms in which each of optional and nonadjacent methylene groups (-CH2-) may be substituted by an oxygen atom; X represents a halogen atom, -CF3, -CF2H, -CFH2, -OCF3 or -OCF2H; each of Z1 and Z2 independently represents -(CH2)2-, -(CH2)4-, -CH2O-, -OCH2- or a covalent bond, but Z1 and Z2 are not covalent bonds simultaneously; each of Y1, Y2, Y3, Y4, Y5, and Y6 independently represents H or F, but at least one of Y1, Y2, Y3, and Y4 represents F; and any atom constituting this compound may be substituted by an isomer thereof.