| abstract |
(57) [Summary] [Structure] General formula [Chemical formula 1] [R 1 , R 2 ; alkyl group having 1 to 14 carbon atoms, X; direct bond, -O- or -C≡C-, Y; -C≡C- or -CH 2 CH 2- , A: a group represented by the following chemical formula 2, a 1,4-phenylene group and the like]. [Chemical 2] [Effect] By using this compound as a basic substance, a low-viscosity ferroelectric liquid crystal composition excellent in practicality can be obtained. In particular, it is useful as a component for making the dielectric anisotropy of the liquid crystal composition negative, and can widen the temperature range of the smectic C phase. |