Liquid crystal composition and liquid crystal display device

A liquid crystal composition that has a nematic phase, and contains at least one compound selected from the group of compounds represented by formula (1) as a first component, and at least one compound selected from the group of compounds represented by formula (2) as a second component:

• wherein, in formula (1) and formula (2), R1 is alkyl having 1 to 12 carbons in which at least one methylene is replaced by oxygen, or alkenyl having 2 to 12 carbons in which at least one methylene is replaced by oxygen;
• R2 is alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine;
• R3 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons, ring A and ring B are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl or tetrahydropyran-2,5-diyl;
• Z1 and Z2 are independently a single bond, ethylene, vinylene, carbonyloxy or methyleneoxy;
• Z3 and Z4 are independently a single bond, ethylene, carbonyloxy or difluoromethyleneoxy;
• X1 and X2 are independently hydrogen or fluorine;
• Y1 is fluorine, chlorine, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, alkoxy having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyloxy having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine;
• a and b are independently 0 or 1;
• c is 1, 2, 3 or 4, d is 0, 1, 2 or 3, and a sum of c and d is 4 or less.