| abstract |
The present invention is stable against heat, light, and the like, can form a nematic phase over a wide temperature range, has a low viscosity, moderate optical anisotropy, and has elastic modulus K 33 and K 11 (where K 33 : elastic bending modulus) And K 11 : elastic splay modulus), provide a liquid crystal compound having a suitable negative dielectric anisotropy and excellent compatibility with other liquid crystal compounds. There is also provided a liquid crystal composition using this liquid crystal compound and a liquid crystal display element using the liquid crystal composition.n n n The liquid crystal compound is represented by the following formulas (a) to (d): (a) (b) (c) (d), wherein Ra and Rb are each independently linear chain alkyl or linear chain alkoxy Represents; Rings A 1 , A 2 , B and C each independently represent trans-1,4-cyclohexylene or 1,4-phenylene; Z 11 , Z 12 , Z 2 and Z 3 each independently represent a single bond or alkylene; One of X 1 and X 2 represents fluorine and the other represents chlorine. |