3-(2,4-Difluoroanilino)-9-nitrodibenzo[b,e]oxepin-11(6H)-one

@article{Baur2011324Difluoroanilino9nitrodibenzobeoxep,
  title={3-(2,4-Difluoroanilino)-9-nitrodibenzo[b,e]oxepin-11(6H)-one},
  author={B. Baur and D. Schollmeyer and S. Laufer},
  journal={Acta Crystallographica Section E: Structure Reports Online},
  year={2011},
  volume={67},
  pages={o555 - o555}
}
In the title compound, C20H12F2N2O4, the two benzene rings of the tricyclic unit are oriented at a dihedral angle of 30.6 (1)°. The 2,4-difluoroanilino residue is oriented at a dihedral angle of 68.2 (1)° with respect to the phenoxy ring. In the crystal, N—H⋯O hydrogen bonds between the amino group and the carbonyl O atom of the oxepinone ring link the molecules into infinte chains along the c axis. 
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C9—C10—C11—C12 −0.6 (3) N16—C17—C22—C21 −179.9 (2) C9—C10—C11—N26 177.82 (18) C10—C11—N26—O27 10 C10—C11—C12—C13 −0.8 (3) C12—C11—N26—O27 −171.3 (2) N26—C11—C12—C13 −179.2 (2) C10—C11—N26—O28 −169
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