LIQUID CRYSTAL COMPOUNDS HAVING NEGATIVE PERMITTIVITY, LIQUID CRYSTAL COMPOSITIONS, AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

An object of the present invention is to provide liquid crystalline compounds and liquid crystalline compositions suitable for liquid crystalline materials such as IPS mode in which negative dielectric anisotropy being required. A liquid crystalline compound expressed by the general formula (1) <CHEM> whrein, R1 and R2 being alkyl group having from 1 to 10 C atom(s) etc., Z1 to Z4 being -(CH2)2- etc., A1 to A3 being 1,4-cyclohexylene etc., Q1 and Q2 being -CH2- etc., X being optionally haloalkyl or -CH2-, k, l, m and n being 0 or 1, provided that l+k+m+n</=3, each independently.