| abstract |
(57) [Problem] To provide an optically active compound which provides a liquid crystal composition having a short helical pitch length and a low viscosity. An R-Cy-CH 2 CH 2 -Cy-Ph'-XR * a compound represented, a liquid crystal device using the liquid crystal composition and the liquid crystal composition containing the compound. Here, R represents an aliphatic hydrocarbon group, R * Is an aliphatic hydrocarbon group having an asymmetric carbon atom, Cy is a trans-1,4-cyclohexylene group, and Ph ′ is 1,4 X is -COO- or the like; |