title: N,N'-[2,2'-(Phenyl-aza-nedi-yl)bis-(ethane-2,1-di-yl)]dipicolinamide.
abstract: The asymmetric unit of the title compound, C22H23N5O2, contains two independent mol-ecules with similar conformations; the terminal pyridine rings are oriented at dihedral angles of 23.99 (8) and 18.07 (8)° with respect to the central benzene ring in one mol-ecule and 28.99 (8) and 23.22 (8)° in the other. In the crystal, N-H⋯O and weak C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional supra-molecular structure. Weak inter-molecular C-H⋯π inter-actions are also observed in the crystal.
authors.affiliation: College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, People's Republic of China.
authors.forename: Gao-Nan
authors.initials: GN
authors.lastname: Li
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: Niu
authors.forename: Mei-Qi
authors.initials: MQ
authors.lastname: Huang
authors.forename: Ying
authors.initials: Y
authors.lastname: Zou
authors.forename: Liang-Jiang
authors.initials: LJ
authors.lastname: Hu