申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US05194178A1
公开(公告)日:1993-03-16
Chloro tolanes of the formula I ##STR1## wherein R.sup.1 denotes alkyl with up to 12 carbon atoms wherein one or two non-adjacent CH.sub.2 groups may also be replaced by --O--, --O--CO--, --CO--O-- and/or --CH.dbd.CH--, A is trans-1,4-cyclohexylene or 1,4-phenylene, r is 0 or 1, s is 0 or 1, L.sup.1 and L.sup.2 are H or F, whereby one of the substituents L.sup.1 and L.sup.2 is F and the other is H or F and if s is 0 and R.sup.1 is alkyl having 2 to 12 carbon atoms both L.sup.1 and L.sup.2 may be H are suitable as components of liquid crystalline media.
化学式I中的氯代甲苯 ##STR1## 其中R.sup.1表示具有最多12个碳原子的烷基,其中一个或两个非相邻的CH.sub.2基团也可以被--O--,--O--CO--,--CO--O--和/或--CH.dbd.CH--所取代,A为反-1,4-环己基或1,4-苯基,r为0或1,s为0或1,L.sup.1和L.sup.2为H或F,其中L.sup.1和L.sup.2的取代基之一为F,另一个为H或F,如果s为0且R.sup.1为具有2至12个碳原子的烷基,则L.sup.1和L.sup.2都可以是H,适用于液晶介质的组分。