Liquid crystal compound having biphenylene, liquid crystal composition and liquid crystal display device

A liquid crystal composition, containing at least one compound selected from the group of compounds represented by formula (1) and at least one compound selected from the group of compounds represented by formulas (2) to (4):

• wherein, in formula (1),
• R1 and R2 are independently hydrogen or alkyl having 1 to 15 carbons, and in the alkyl, at least one piece of —CH2— may be replaced by —O—, —S—, —CO— or —SiH2—, and at least one piece of —CH2CH2— may be replaced by —CH═CH— or —C≡C—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine;
• A1, A2, A3 and A4 are independently 1,2-cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,4-cyclohexylene, 1,4-cycloheptylene, 1,4-phenylene, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, naphthalene-2,6-diyl, 9,10-dihydrophenanthrene-2,7-diyl, 9H-xanthene-2,6-diyl or 9H-fluorene-2,7-diyl, and in the groups, at least one piece of —CH2— may be replaced by —O—, —S—, —CO— or —SiH2—, and at least one piece of —CH2CH2— may be replaced by —CH═CH— or —CH═N—, and in the divalent groups, at least one hydrogen may be replaced by fluorine, chlorine, —C≡N, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2 or —OCH2F;
• Z1, Z2, Z3 and Z4 are independently a single bond or alkylene having 1 to 6 carbons, and in the alkylene, at least one piece of —CH2— may be replaced by —O—, —S—, —CO— or —SiH2—, and one or two pieces of —CH2CH2— may be replaced by —CH═CH— or —C≡C—, and in the divalent groups, at least one hydrogen may be replaced by fluorine or chlorine;
• Y1, Y2 and Y3 are independently fluorine, chlorine, —CF3 or —CHF2;
• and
• a, b, c and d are independently 0 or 1, and a sum of a, b, c and d is an integer from 0 to 3;
• and
• wherein, in formulas (2) to (4),
• R11 and R12 are independently alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, and in the alkyl and the alkenyl, at least one piece of —CH2— may be replaced by —O—, and in the groups, at least one hydrogen may be replaced by fluorine;
• ring B1, ring B2, ring B3 and ring B4 are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene or pyrimidine-2,5-diyl;
• and
• Z11, Z12 and Z13 are independently a single bond, —COO—, —CH2CH2—, —CH═CH— or —C≡C—.