Patent ID: 8231806

Claim:
A liquid-crystalline medium, comprising: one or more compounds of formula I wherein R 1 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, Z 11 and Z 12 , independently of one another, denote —CH 2 CH 2 —, —CF 2 CF 2 —, —COO—, trans-CH═CH—, trans-CF═CF—, —CH 2 O—, —CF 2 O— or a single bond, L 11 and L 12 , independently of one another, denote H, F or Cl, and X 1 denotes F, Cl, —CFH 2 , —CF 2 H, —CF 3 , —OCF 2 H or —OCF 3 .