title: 4-(Piperidin-1-yl)-4H-benzo[b]tetra-zolo[1,5-d][1,4]diazepin-5(6H)-one.
abstract: There are two crystallographically unique mol-ecules present in the asymmetric unit of the title compound, C(14)H(16)N(6)O; in both mol-ecules, the seven-membered diazepinone ring adopts a boat-like conformation and the chair conformation piperidine ring is an axial substituent on the diazepinone ring. In the crystal, each mol-ecule forms hydrogen bonds with its respective symmetry equivalents. Hydrogen bonding between mol-ecule A and symmetry equivalents forms two ring motifs, the first formed by inversion-related N-H⋯O inter-actions and the second formed by C-H⋯O and C-H⋯N inter-actions. The combination of both ring motifs results in the formation of an infinite double tape, which propagates in the a-axis direction. Hydrogen bonding between mol-ecule B and symmetry equivalents forms one ring motif by inversion-related N-H⋯O inter-actions and a second ring motif by C-H⋯O inter-actions, which propagate as a single tape parallel with the c axis.
authors.forename: Gary S
authors.initials: GS
authors.lastname: Nichol
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Xu
authors.forename: Christine E
authors.initials: CE
authors.lastname: Kaiser
authors.forename: Christopher
authors.initials: C
authors.lastname: Hulme