Thiophene compound, liquid-crystalline medium and liquid-crystal display comprising the same

A liquid-crystalline medium comprising one or more compounds of formula T

• in which
• denotes
• one of
• which is present, denotes
• and the other
• if present, denotes
• wherein each
• are optionally substituted by one or two alkyl groups,
• n denotes 1 or 2,
• RS denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, in which one —CH2— group may be replaced by cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene or 1,3-cyclo-pentenylene, or denotes alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, in which one —CH2— group may be replaced by cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene or 1,3-cyclo-pentenylene, and
• Xs denotes F, Cl, CN, NCS or fluorinated alkyl, fluorinated alkenyl, fluorinated alkoxy or fluorinated alkenyloxy having 1 to 4 C atoms,
• and
• one or more compounds of formula II
• in which
• R2 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms,
• on each appearance, independently of one another, denote
• L21 and L22 denote H or F,
• X2 denotes halogen, halogenated alkyl or alkoxy having 1 to 3 C atoms or halogenated alkenyl or alkenyloxy having 2 or 3 C atoms,
• m denotes 2.