Date Published: June 01, 2010
Publisher: International Union of Crystallography
Author(s): Salman Tariq Khan, Peng Yu, Suchada Chantrapromma, Yong-En Guo, Nighat Afza.
The molecule of the title compound, C13H9NO2, is slightly twisted with a dihedral angle of 4.85 (9)° between the nine-membered ring system and the phenyl ring. The nine non-H atoms of the 1H-pyrrolo[2,1-c][1,4]oxazin-1-one system are coplanar [r.m.s. deviation = 0.0122 (2) Å]. In the crystal, weak intermolecular C—H⋯O interactions link molecules into chains along . The crystal studied was an inversion twin with a 0.48624 (9):0.51376 (9) domain ratio.
For the biological activity and applications of pyrrolo[1,2-a]pyrazine derivatives, see: Bélanger et al. (1983 ▶); Fu et al. (2002 ▶); Micheli et al. (2008 ▶). For a related structure, see: Khan et al. (2010 ▶). For standard bond-length data, see: Allen et al. (1987 ▶).