| abstract |
Challenges include high stability to heat and light, high clearing point, low minimum temperature of liquid crystal phase, small viscosity, appropriate optical anisotropy, large negative dielectric anisotropy, appropriate elastic constant, room temperature and low temperature. An object of the present invention is to provide a liquid crystal compound satisfying at least one of physical properties such as good compatibility with other liquid crystal compounds, a liquid crystal composition containing this compound, and a liquid crystal display device containing this composition. The means is a compound represented by the formula (1) or the like. Wherein, R 1 and R 2 is hydrogen, alkyl or and the like alkoxy having 2 to 9 carbon atoms of 1 to 10 carbon atoms; ring A 1 is 1,3-cyclopentylene, and the like; Y 1 and Y 2 is hydrogen or fluorine; Z 1 and Z 2 are a single bond or alkylene having 1 to 6 carbon atoms; ring N 1 is 1,4-cyclohexylene or 1,4-phenylene And n is 0, 1 or 2. |