Disclosed are dibenzofuran and dibenzothiophene derivatives of the general formula I,
in which X
1
, X
2
, W, Y, R, A, Z and m have the meaning defined in claim
1,
to a process for the preparation thereof, to the use thereof as components in liquid-crystalline media, and to electro-optical display elements which contain the liquid-crystalline media according to the invention.
本申请揭示了一般式I的
二苯并呋喃和
二苯并噻吩衍
生物,其中X1、X2、W、Y、R、A、Z和m的含义如权利要求1中所定义,以及其制备方法、作为液晶介质中的组分使用以及包含根据本发明的液晶介质的电光显示元件。