2,4-Diphenyl-4,5-dihydro-3H-pyrido[2,3-b][1,4]diazepine.
2009
The asymmetric unit of the title compound, C20H17N3, contains two crystallographically independent molecules (A and B). In molecule A, the two benzene rings form dihedral angles of 74.12 (7) and 7.83 (7)° with the pyridine ring, while in molecule B these angles are 77.48 (7) and 21.50 (7)°. The seven-membered heterocyclic ring adopts a boat conformation in both molecules. In the crystal structure, each of the independent molecules forms a centrosymmetric R22(8) dimer linked by paired N—H⋯N hydrogen bonds. The crystal structure is further stabilized by intermolecular C—H⋯N hydrogen bonds and C—H⋯π interactions.
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