| abstract |
Shown is a liquid crystal compound satisfying at least one of physical properties such as high stability to heat, light and so forth, a high clearing point, a low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, a suitable elastic constant and excellent compatibility with other liquid crystal compounds. The compound is represented by formula (1). n n n n n n n n n n In the formula, for example, R 1 and R 2 are alkyl having 1 to 15 carbons, and ring A 1 , ring A 2 and ring A 3 are 1,4-cyclohexylene or 1,4-cyclohexenylene, Z 1 , Z 2 and Z 3 are a single bond or —(CH 2 ) 2 —, a, b and c are 0 or 1, and a sum of a, b, and c is 0, 1 or 2. |