| abstract |
(57) [Summary] (Modified) [Purpose] A composition having excellent properties as a liquid crystal material, stable under normal use environment, and improved in properties such as viscosity and optical anisotropy, and the like. Provision of used liquid crystal display elements. [Structure] General formula I (In the formula, ring A 1 , ring A 2 and ring A 3 are 1,4-phenylene, 1,4-cyclohexylene and the like, which may be substituted with 1 or 2 fluorine atoms, and R 1 is a ring. When A 1 is 1,4-phenylene, it represents a cyano group, a halogen atom or the like, and when ring A 1 represents 1,4-cyclohexylene or the like, R 1 represents an alkyl group, an alkoxy group or the like; B 1 , B 2 and B 3 represent a covalent bond, ethylene, ethenylene, etc., n1, n2, and n3 are each independently 0 or 1, R 2 is a formula II or a formula III, and X is a hydrogen atom or a fluorine atom. And ring H represents 1,4-cyclohexylene. However, the molecule does not contain two or more heterocycles at the same time. ) The acrylonitrile derivative shown by these. |