title: 4-(4-Fluoro-phen-yl)-2-oxo-1,2,5,6-tetra-hydro-benzo[h]quinoline-3-carbonitrile.
abstract: In the mol-ecule of the title compound, C(20)H(13)FN(2)O, the fluoro-phenyl ring is oriented at a dihedral angle of 72.76 (3)° with respect to the fused benzene ring. In the crystal structure, inter-molecular N-H⋯O, C-H⋯O and C-H⋯F inter-actions link the mol-ecules into chains. π-π contacts between the quinoline and benzene rings [centroid-centroid distance = 3.918 (3) Å] may further stabilize the structure. A weak C-H⋯π inter-action is also present. The O atom and two of the CH(2) groups of the quinoline ring system are disordered over two positions. The O atom was refined with occupancies of 0.489 (17) and 0.511 (17), while C and H atoms were refined with occupancies of 0.435 (13) and 0.565 (13).
authors.forename: Jinpeng
authors.initials: J
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Ding
authors.forename: Shu
authors.initials: S
authors.lastname: Yan
authors.forename: Liangce
authors.initials: L
authors.lastname: Rong
authors.forename: Lichun
authors.initials: L
authors.lastname: Xu