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

摘要

A silacyclohexane compound represented by the following general formula (I). <IMAGE> (I) R denotes hydrogen, a linear-chain alkyl group with a carbon number of 1-10, a branched-chain alkyl group with a carbon number of 3-8, an alkoxyalkyl group with a carbon number of 2-7, or an alkenyl group with a carbon number of 2-8. For <IMAGE> and <IMAGE> at least one of these is trans-1-silacyclohexylene or trans-4-silacyclohexylene group whose silicon at position 1 or position 4 has a substitutional group(s) of H, F, Cl or CH3, and the other denotes trans-1,4-cyclohexylene group. X denotes a CN, F, Cl, CF3, CF2Cl, CHFCl, OCF3, OCHF2, OCF2Cl, OCHFCl, R or OR group.