Liquid-crystalline medium

A liquid crystal medium, comprising at least one compound of formula C

• in which
• RC denotes H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 12 C atoms, or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 12 C atoms, in which alkyl, alkoxy, alkenyl, alkenyloxy or alkoxy-alkyl one or more CH2-groups may be replaced by
• LC1, LC2 identically or differently, denote H, Cl or F,
• RC1, RC2, RC3,
• RC4, RC5, and RC6 identically or differently, denote H, F, Cl, or alkyl having 1 to 6 C atoms, or cyclopropyl, cyclobutyl or cyclopentyl;
• and
• one or more compounds of I or II,
• and at least one compound of formula III-1
• in which
• R1 denotes H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms, or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms, in which alkyl, alkoxy, alkenyl, alkenyloxy or alkoxy-alkyl one or more CH2-groups may be replaced by
• n is 0, 1 or 2,
• on each occurrence, independently of one another, denote
• in which RL, on each occurrence identically or differently, denotes H or alkyl having 1 to 6 C atoms,
• and wherein
• alternatively denotes
• R2 denotes H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms, or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms, in which one or more CH2-groups may be replaced by
• Z21 denotes trans-CH═CH—, trans-CF═CF— or —C≡C—, and
• independently of one another, denote
• in which
• RL, on each occurrence identically or differently, denotes H or alkyl having 1 to 6 C atoms;
• R3 denotes H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms, or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms, in which one or more CH2-groups may be replaced by
• one of Z31 and Z32, denotes trans-CH═CH—, trans-CF═CF— or —C≡C— and the other one, independently thereof, denotes —C≡C—, trans-CH═CH—, trans-CF═CF— or a single bond, and
• independently of one another, denote
• in which RL, on each occurrence identically or differently, denotes H or alkyl having 1 to 6 C atoms,
• and wherein
• alternatively denotes
• the liquid crystal medium also comprising 10 to 32% by weight of one or more compounds of formula T
• in which
• RT denotes halogen, CN, NCS, RF, RF—O— or RF—S—, wherein
• RF denotes fluorinated alkyl or fluorinated alkenyl having 2 to 12 C atoms,
• on each occurrence, independently of one another, denote
• L1 and L2 identically or differently, denote Cl, F, alkyl having 1 to 6 C atoms or cyclopropyl, cyclobutyl or cyclopentyl, and
• t is 0, 1 or 2
• wherein the one or more compounds of formula C and one or more compounds of formula III-1 are present in the medium in an amount of 35 to 50%.