abstract |
The present invention relates to dibenzofuran and dibenzothiophene derivatives of the general formula I, n nin 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. |