| abstract |
A liquid-crystal compound satisfying at least one physical property such as a high clearing point, large dielectric anisotropy and excellent compatibility with other liquid-crystal compounds is described; a liquid-crystal composition containing the compound; and a liquid-crystal display device. n The compound is represented by formula (1): n n n n n n n n n n wherein, R 1 and R 2 are independently alkyl having 1 to 15 carbons, and in the alkyl, at least one —CH 2 — may be replaced by —O—, —CH═CH— or the like;n ring A 1 , ring A 2 and ring A 3 are independently 1,4-cyclohexylene, 1,4-phenylene or the like, and at least one ring A 1 , ring A 2 or ring A 3 is represented by formula (A): nn n n n n n n n n n wherein, X 1 and X 2 are independently hydrogen or halogen; and n Z 1 , Z 2 and Z 3 are independently a single bond, —(CH 2 ) 2 — or the like; and n a, b and c are independently 0 or 1, and a sum of a, b and c is 1, 2 or 3. |