title: 2,4-Diphenyl-4,5-dihydro-3H-pyrido[2,3-b][1,4]diazepine.
abstract: The asymmetric unit of the title compound, C(20)H(17)N(3), contains two crystallographically independent mol-ecules (A and B). In mol-ecule A, the two benzene rings form dihedral angles of 74.12 (7) and 7.83 (7)° with the pyridine ring, while in mol-ecule B these angles are 77.48 (7) and 21.50 (7)°. The seven-membered heterocyclic ring adopts a boat conformation in both mol-ecules. In the crystal structure, each of the independent mol-ecules forms a centrosymmetric R(2) (2)(8) dimer linked by paired N-H⋯N hydrogen bonds. The crystal structure is further stabilized by inter-molecular C-H⋯N hydrogen bonds and C-H⋯π inter-actions.
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Chin Sing
authors.initials: CS
authors.lastname: Yeap
authors.forename: Anita
authors.initials: A
authors.lastname: Hazra
authors.forename: Subrata
authors.initials: S
authors.lastname: Jana
authors.forename: Shyamaprosad
authors.initials: S
authors.lastname: Goswami