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

摘要

There is provided a silacyclohexane compound and method of making same. The silacyclohexane compound has the following formula (1): <IMAGE> (1) wherein R denotes a linear-chain alkyl group with a carbon number of 1-10, a mono- or di-fluoroalkyl 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, <IMAGE> denotes a trans-1-sila-1,4-cyclohexylene or a trans-4-sila-1,4-cyclohexylene group having silicon at positions 1 or 4 with substitutional group(s) of H, F, C1 or CH3; n denotes 0 or 1; L1 and L2 independently denote H.F, C1, CN or CH3; L3 denotes F; m denotes O, 1 or 2; and X denotes H, CN, F, C1, CF3, CC1F2, CHFC1, OCC1F2, OCHFC1, OCHF2, OCF3, R or OR group.