| abstract |
A liquid crystal compound is provided, which possesses general physical properties essential for a compound, stability against heat, light and so on, wide temperature range for mesophase, high transparency point, good compatibility with other liquid crystal compounds, large refractive index anisotropy and large dielectric anisotropy. A liquid crystal composition is provided, which contains the aforesaid liquid crystal compound. A liquid crystal display device is provided, which contains the aforesaid liquid crystal composition. A compound is represented by formula (1): wherein, for example, R1 is C1-C20 alkyl; at least one of rings A1 to A6 is pyrimidine-2,5-diyl or pyridine-2,5- diyl, and the others are 1,4-cyclohexylene or 1,4-phenylene; Z1 to Z6 are single bonds; L1 to L4 are hydrogen or halogen; X1 is hydrogen, halogen, -C ≡ N or C1-C10 alkyl; l, m, n, o, p and q are 0 or 1, and l+m+n+o+p+q=3. |