Date Published: July 01, 2012
Publisher: International Union of Crystallography
Author(s): Qian-Shou Zong, Jian-Yi Wu.
The asymmetric unit of the title compound, C9H9NO2·2H2O, comprises two independent organic molecules and four water molecules of crystallization. The heterocyclic rings are not planar: in one molecule, the C atom bearing the O atom and the adjacent methylene C atom are displaced by 0.320 (3) and 0.677 (3) Å, respectively, from the other eight atoms of the fused ring system. Equivalent values of 0.243 (3) and 0.659 (3) Å apply to the second molecule. In the crystal, the components are linked by N—H⋯O and O—H⋯O hydrogen bonds, forming a three-dimensional network.
For background to quinolin-2-ones as drugs, see: Braun et al. (2009a ▶,b ▶).