Liquid-crystalline medium and high-frequency components comprising same

Liquid-crystal medium, which comprises:

• one or more compounds selected from the compounds of formulae T-1 and T-3:
• wherein
• Alkyl1 is methyl or ethyl,
• one or more compounds selected from the group of compounds of formulae I, II and III
• in which
• L11 denotes R11 or X11,
• L12 denotes R12 or X12,
• R11 and R12, independently of one another, denote H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 15 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms,
• X11 and X12, independently of one another, denote H, F, Cl, —CN, —NCS, —SF5, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated or fluorinated alkoxyalkyl having 2 to 7 C atoms, and
• independently of one another, denote
• in which
• L21 denotes R21 and, in the case where Z21 and/or Z22 denote trans-CH═CH— or trans-CF═CF—, alternatively denotes X21,
• L22 denotes R22 and, in the case where Z21 and/or Z22 denote trans-CH═CH— or trans-CF═CF—, alternatively denotes X22,
• R21 and R22, independently of one another, denote 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,
• X21 and X22, independently of one another, denote F or Cl, —CN, —NCS, —SF5, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, fluorinated alkenyloxy or fluorinated alkoxyalkyl having 2 to 7 C atoms,
• one of
• Z21 and Z22 denotes trans-CH═CH—, trans-CF═CF— or —C≡C— and the other, independently thereof, denotes trans-CH═CH—, trans-CF═CF— or a single bond, and
• independently of one another, denote
• in which
• L31 denotes R31 or X31,
• L32 denotes R32 or X32,
• R31 and R32, independently of one another, denote 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,
• X31 and X32, independently of one another, denote H, F, Cl, —CN, —NCS, —SF5, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, unfluorinated or fluorinated alkenyloxy or unfluorinated or fluorinated alkoxyalkyl having 2 to 7 C atoms,
• Z31 to Z33, independently of one another, denote trans-CH═CH—, trans —CF═CF—, —C≡C— or a single bond, and
• independently of one another, denote
• one or more compounds of the formula IV:
• wherein
• R41 to R42 independently of one another, denote unfluorinated alkyl or unfluorinated alkoxy, each having 1 to 15 C atoms, unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl, each having 2 to 15 C atoms, or cycloalkyl, alkylcycloalkyl, cycloalkenyl, alkylcycloalkenyl, alkylcycloalkylalkyl or alkylcycloalkenylalkyl, each having up to 15 C atoms,
• and
• one or more compounds of the following formula PGUQU-n-F
• where n is an integer from 1 to 7.