Research Article: 2-Hydr­oxy-N′-(2-hydr­oxy-4-methoxy­benzyl­idene)-3-methyl­benzohydrazide monohydrate

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).

Partial Text

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 ▶).




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