Silacyclohexane compound, a method of preparing it and a liquid crystal composition containing it

摘要

A liquid crystal composition comprising a silacyclohexane compound represented by the following formula (I): <IMAGE> (I) wherein R and R' denote an alkyl group, a mono- or di-fluoroalkyl group, an alkoxyalkyl group or an alkenyl group; at least one of <IMAGE> and <IMAGE> denotes a silacyclohexylene group whose silicon at positions 1 or 4 has a substitutional group of H, F, Cl of CH3, and the other denotes a silacyclohexylene group whose silicon at positions 1 or 4 has a substitutional group of H, F, Cl or CH3 or a cyclohexylene group; and 0-2 of the substitutional groups X on the aromatic rings denote F and the remaining X's denote H.