Chlorofluorobenzene liquid crystal compound, liquid crystal composition, and liquid crystal display device

摘要: Such a liquid crystal compound is provided that has stability to heat, light and so forth, nematic phase in wide temperature range, small viscosity, suitable optical anisotropy, elastic constants K33 K11 (K33: bend constant, K11: splay constant), negative dielectric anisotropy excellent compatibility with other compounds. A composition containing the compound, display device are also provided. The represented by one of formulas (a) (d), contains composition: wherein Ra Rb independently linear alkyl or alkoxy, rings A1, A2, B C trans-1,4-cyclohexylene 1,4-phenylene, Z11, Z12, Z2 Z3 single bond alkylene, X1 X2 fluorine, thereof chlorine.