Patent ID: 7361388

Claim:
Liquid-crystalline compound of the formula I where R 11 denotes H, an alkyl or alkoxy radical having 1 to 15 carbon atoms or alkenyl or alkenyloxy radical having 2 to 15 carbon atoms, each of which is unsubstituted or mono- or polysubstituted by halogen, where, in addition, one or more CH 2 groups in these radicals may each, independently of one another, be replaced by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another; X 11 denotes F, Cl, CN, NCS, SF 5 , halogenated alkyl radical, halogenated alkoxy radical, halogenated alkenyl radical or halogenated alkenyloxy radical, each having up to 7 C atoms, and Z 11 is a single bond, Z 12 and Z 13 each, independently of one another, denote —C 2 H 4 —, —C≡C—, —C 2 F 4 —, —CHO—, —OCH—, —COO—, —CF═CF—, —CH═CH—, —CH═CF—, —CF 2 O—, —OCF 2 —, —(CH 2 ) 4 —, —(CH 2 ) 3 — or a single bond, L 11 , L 12 , L 13 , L 14 , L 15 and L 16 , independently of one another, denote H or F.