Research Article: N′-[(E)-4-Benz­yloxy-2-hy­droxy­benzyl­idene]-4-nitro­benzohydrazide monohydrate

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): Bibitha Joseph, M. Sithambaresan, M. R. Prathapachandra Kurup.


The title compound, C21H17N3O5·H2O, exists in the keto form with an E conformation with respect to the azomethine double bond. The twist angles between the aromatic rings are in the range 4.67 (10)–17.54 (10)°. A water mol­ecule of solvation is present in the lattice. A conventional intra­molecular O—H⋯N hydrogen bond increases the rigidity of the mol­ecule. Inter­molecular O—H⋯O, N—H⋯O and C—H⋯O hydrogen-bonding inter­actions establish a supra­molecular linkage among the mol­ecules in the crystal structure. There are also C—H⋯π inter­actions present.

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For the biological and other applications of carbohydrazides, see: Lakshmi et al. (2011 ▶); Grande et al. (2007 ▶); Naseema et al. (2010 ▶). For the synthesis, see: Emmanuel et al. (2011 ▶). For related structures of carbohydrazides, see: Fun et al. (2008 ▶). For the keto form, see: Bakir & Brown (2002 ▶).