Tercyclohexane, liquid-crystalline compound and liquid crystal composition comprising same

摘要

The present invention provides a liquid-crystalline compound which has a reduced viscosity, a wide liquid crystal temperature range (high clearing point), a high chemical stability (extremely high specific resistance, high voltage holding ratio) and a high solubility with other liquid-crystalline compound(s) and preferably has a proper refractive index anisotropy. The present invention also provides a liquid crystal composition having excellent properties. The liquid-crystalline compound is represented by the following general formula (1): wherein R and R' each independently represents a C1-20 alkyl or halogenated alkyl group or a group obtained by replacing one or more -CH2- groups in the alkyl group by any of -O-, -S-, -CH=CH- or -C 3BOND C-, provided that two or more -CH2- groups are not consecutively replaced by either -O- or -S-; and Z1 and Z2 each independently represents a covalent bond or 1,2-ethylene group, provided that when both Z1 and Z2 are a covalent bond, R and R' are not straight-chain alkyl groups each having the same chain length.