The invention provides a liquid crystal compound having a high stability to heat, light or the like, a wide temperature range of a nematic phase, a small viscosity, a large optical anisotropy and a suitable elastic constant K33, and further having a suitable negative dielectric anisotropy and an excellent compatibility with other liquid crystal compounds. The invention also provides a liquid crystal composition including this liquid crystal compound and a liquid crystal display device containing this liquid crystal composition;
a liquid crystal compound represented by formula (a):
本发明提供了一种液晶化合物,具有高热稳定性、光稳定性等,具有广泛的向列相温度范围、小粘度、大光学各向异性和适当的弹性常数K33,还具有适当的负介电各向异性和与其他液晶化合物的优异相容性。本发明还提供了一种包括该液晶化合物的液晶组合物和包含该液晶组合物的液晶显示装置;液晶化合物的
化学式为(a)。