Benzyl ether derivative, a liquid crystal composition and liquid crystal display device

摘要

The present invention has a large elastic constant ratio, low viscosity compared with an existing liquid crystalline compound, and compatibility with other liquid crystal compounds, particularly, liquid crystal compound having the following formula (1) excellent in low temperature miscibility and chemically stable, and a liquid crystal composition containing the liquid crystal compound of the following formula (1); A liquid crystal element used is provided.(R1 is an alkyl group or alkenyl group, R2 is an alkylene group, R3 is an alkenyl group, ring a is a phenylene group, ring B, C, D is a cyclohexylene group or a phenylene group, Z1 ~ Z3 is a single bond, alkylene, - CH = ch -, N and M represent 0 or 1)