title: N,N'-Diethyl-N,N'-diphenyl-pyridine-2,6-dicarboxamide.
abstract: The asymmetric unit of the title compound, C(23)H(23)N(3)O(2), contains two mol-ecules in both of which, one amide N atom is in a syn position with respect to the pyridine N atom, while the other amide N atom is in an anti position (the syn--anti conformation). There are minor conformational differences between the two mol-ecules, as reflected in the N(pyridine)-C-C-N(amide) torsion angles of -44.9 (3) and 136.0 (2)° for one mol-ecule and 43.5 (3) and -131.1 (2)° for the other mol-ecule. However, the two mol-ecules show significant differences in the orientation of an ethyl group, with corresponding C-C-N-C torsion angles of 86.6 (3)° for one mol-ecule and 79.6 (3)° for the other mol-ecule. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds, forming a three-dimensional supra-molecular network.
authors.forename: Blanka
authors.initials: B
authors.lastname: Klepetářová
authors.forename: Emanuel
authors.initials: E
authors.lastname: Makrlík
authors.forename: Vasily A
authors.initials: VA
authors.lastname: Babain
authors.forename: Václav
authors.initials: V
authors.lastname: Kašička