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) In this formula, R denotes a linear-chain alkyl group with a carbon number of 1-10, a mono- or di- fluoro-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. or trans-4-sila-1,4-cyclohexylene group whose silicon at position 1 or position 4 has a substitutional group(s) of H, F, Cl or CH3. X denotes a CN, F, Cl, CF3, CF2Cl, CHFCl, OCF3, OCHF2, OCF2Cl, OCHFCl, R or OR group (R is the same as defined in the general formula (I)). Y2 and Z denote H or F, independently to each other. Y1 denotes H, F or Cl.