Benzoic acid derivative having a large positive dielectric anisotropy value

摘要

A benzoic acid derivative having a large positive dielectric anisotropy value and a superior compatibility, reducing the threshold voltage value of the resulting liquid crystal cell and being very effective for broadening the mesomorphic range of the resulting liquid crystal composiiton and reducing the driving voltage, and a liquid crystal composition containing the derivative are provided, which benzoic acid derivative is expressed by the formula <IMAGE> (I) wherein R represents an alkyl group of 1 to 10 carbon atoms and A represents <IMAGE>