title: 2,2-Diphenyl-benzo[c]quinoline-1-ox-yl.
abstract: In the title compound, C(25)H(18)NO, a stable phenanthridinic nitroxide, the ring containing the nitroxide function assumes a twist-boat conformation and the dihedral angle formed by adjacent benzene rings is 21.78 (5)°. The phenyl substituents at position 2 are approximately orthogonal to each other, forming a dihedral angle of 81.04 (4)°. The crystal structure is stabilized by an intra-molecular C-H⋯O hydrogen bond and by C-H⋯π inter-actions.
authors.forename: Corrado
authors.initials: C
authors.lastname: Rizzoli
authors.forename: Elda
authors.initials: E
authors.lastname: Marku
authors.forename: Lucedio
authors.initials: L
authors.lastname: Greci
authors.forename: Paola
authors.initials: P
authors.lastname: Astolfi