(E)-1-(4-Methylphenyl)ethanone [8-(trifluoromethyl)quinolin-4-yl]hydrazone

In the title compound, C19H16F3N3, the dihedral angle between the naphthalene and quinoline ring systems is 14.58 (8)degrees. The hydrazone C-N-N = C-C chain is in an extended conformation and its mean plane is nearly coplanar with the quinoline plane [dihedral angle = 3.45 (9)degrees]. The bond angles within the phenyl ring show the almost additive influence of the two para substituents. In the crystal, weak pi-pi [centroid-centroid distances = 3.779 (2) and 3.718 (1) angstrom] and C-H center dot center dot center dot F directional interactions join the molecules into centrosymmetric dimers, which are further connected into infinite zigzag chains propagating along a.