申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US05730902A1
公开(公告)日:1998-03-24
An optically active silacyclohexane compound of the formula (I) ##STR1## wherein R represents an organic residue, X represents --CH.sub.2 -- or --O--; Z represents a chiral group having at least one chiral carbon atom; L.sub.1 and L.sub.2 independently represent H or F, n is 0 or 1; ##STR2## represents a trans-1-sila-1,4-cyclohexylene group or trans-4-sila-1,4-cyclohexylene group whose silicon atom at the 1 or 4 position has H, F, Cl or CH.sub.3, or a 1,4-cyclohexylene group; and ##STR3## represents a trans-1-sila-1,4-cyclohexylene group or trans-4-sila-1,4-cyclohexylene group whose silicon atom at the 1 or 4 position has H, F, Cl or CH.sub.3, a 1,4-cyclohexylene group or a 1,4-phenylene group provided that at least one of ##STR4## represents the trans-1-sila-1,4-cyclohexylene group or trans-4-sila-1,4-cyclohexylene group defined above. A liquid crystal composition comprising the compound defined above and a liquid crystal display device comprising the composition are also described.
公式(I)表示的是一种光学活性的硅杂环己烷化合物,其中R代表有机残基,X代表-CH.sub.2-或-O-; Z代表具有至少一个手性碳原子的手性基团; L.sub.1和L.sub.2分别表示H或F,n为0或1; ##STR2##表示具有H、F、Cl或CH.sub.3的1或4位硅原子的顺-1-硅-1,4-环己基或顺-4-硅-1,4-环己基或1,4-环己基; 和##STR3##表示具有H、F、Cl或CH.sub.3的1或4位硅原子的顺-1-硅-1,4-环己基或顺-4-硅-1,4-环己基或1,4-环己基或1,4-苯基,前提是至少有一个##STR4##表示上述定义的顺-1-硅-1,4-环己基或顺-4-硅-1,4-环己基。还描述了一种包含上述化合物的液晶组合物和包含该组合物的液晶显示装置。