Date Published: June 01, 2010
Publisher: International Union of Crystallography
Author(s): You-Yue Han, Yong-Hong Li, Qiu-Rong Zhao.
In the title compound, C16H16N2O4·H2O, the dihedral angle between the two benzene rings is 12.4 (2)° and the molecule adopts an E configuration with respect to the C=N bond. There are intramolecular O—H⋯N and O—H⋯O hydrogen bonds in the hydrazone molecule, which both generate S(6) rings. In the crystal structure, molecules are linked by N—H⋯O and O—H⋯O hydrogen bonds, forming layers parallel to the ab plane. The crystal studied was a non-merohedral twin with a domain ratio of 0.887 (3):0.113 (3).
For our previous studies on hydrazones and for background information, see: Han & Zhao (2010a ▶,b ▶). For reference bond-length data, see: Allen et al. (1987 ▶).