title: N,N'-Bis[4-(trifluoro-meth-yl)phen-yl]pyridine-2,6-dicarboxamide.
abstract: In the title mol-ecule, C(21)H(13)F(6)N(3)O(2), the pyridine ring forms dihedral angles of 1.7 (1) and 5.2 (1)° with the two benzene rings. In the crystal structure, inter-molecular N-H⋯O hydrogen bonds and π⋯π inter-actions [centroid-centroid distance of 3.628 (3) Å between aromatic rings] link mol-ecules into stacks along the c axis. The two trifluoro-methyl groups are each rotationally disordered between two orientations, with occupancy ratios of 0.58 (1):0.42 (1) and 0.55 (1):0.45 (1).
authors.affiliation: Key Laboratory of Pesticide and Chemical Biology, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China .
authors.forename: Le
authors.initials: L
authors.lastname: Chen
authors.forename: Hongwu
authors.initials: H
authors.lastname: He
authors.forename: Hao
authors.initials: H
authors.lastname: Peng