A silacyclohexane compound, a method of preparing it and a liquid crystal composition containing it
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP0659753A1
公开(公告)日:1995-06-28
A silacyclohexane compound represented by the following general formula (I).
In this formula, R and R' denote 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.
For
and
at least one of the two denotes a trans-1-sila-1,4-cyclohexylene or a 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. For the substitutional groups X on the aromatic rings, there are 0, 1 or 2 F's and the remaining ones are H' s.
由以下通式 (I) 代表的硅环己烷化合物。
式中,R 和 R'表示碳原子数为 1-10 的直链烷基、碳原子数为 1-10 的一氟或二氟烷基、碳原子数为 3-8 的支链烷基、碳原子数为 2-7 的烷氧基或碳原子数为 2-8 的烯基。
对于
和
中至少有一个表示反式-1-硅杂-1,4-环己烯或反式-4-硅杂-1,4-环己烯基团,其第 1 位或第 4 位上的硅具有 H、F、Cl 或 CH₃ 取代基团。芳香环上的取代基 X 有 0、1 或 2 个 F,其余为 H。