Patent ID: 7595101

Claim:
A liquid-crystalline medium, comprising a compound of formula I in which R 0 denotes a halogenated or unsubstituted alkyl or alkoxy radical having 1 to 15 C atoms, in which one or more CH 2 groups are optionally, independently of one another, replaced by —C≡C—, —CF 2 O—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, X 0 denotes F, Cl, CN, SF 5 , SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical having up to 6 C atoms, and Y 1-7 each, independently of one another, denote H or F, with provisos that either Y 3 is H or Y 4 and Y 5 are H, or Y 1 and Y 2 are H; and further comprising a compound of formula XIII in which R 1 R 2 each, independently of one another, denote n-alkyl, alkoxy, oxaalkyl, flouroalkyl or alkenyl, each having up to 9 C atoms, where at least one of the radicals R 1 and R 2 denotes alkenyl having 2 to 7 C atoms.