Patent ID: 7785678

Claim:
A liquid-crystal mixture, comprising one or more compounds of formula I in which R 1 denotes an alkyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN or CF 3 or at least monosubstituted by halogen, where, in addition, one or more CH 2 groups in these radicals may be replaced by —O—, —S—, —C≡C—, —CH═CH—, —(CO)O— or —O(CO)— in such a way that O atoms are not linked directly to one another, A 1 , A 2 each, independently, denote a ring system of the formulae pointing to the left or right, Z 1 , Z 2 each, independently, denote a single bond, —CH═CH—, —C≡C— or —CH 2 CH 2 —, and n denotes 0, 1 or 2.