Date Published: July 01, 2012
Publisher: International Union of Crystallography
Author(s): Hadi Kargar, Reza Kia, Muhammad Nawaz Tahir.
http://doi.org/10.1107/S1600536812026190
Abstract
The asymmetric unit of the title compound, C7H9N3O2, comprises two crystallographically independent molecules (A and B). In each molecule there is an intramolecular O—H⋯O hydrogen bond making an S(6) ring motif. In the crystal, a pair of N—H⋯N hydrogen bonds link the two molecules (A and B) into a dimer with an R22(6) ring motif. The B molecules are linked via pairs of N—H⋯O hydrogen bonds, forming inversion dimers with an R22(10) ring motif. The molecules are further linked via other N—H⋯O hydrogen bonds, forming undulating two-dimensional networks lying parallel to the bc plane. These networks are finally linked via N—H⋯O hydrogen bonds, forming a three-dimensional structure.
Partial Text
For background to Schiff bases derived from benzohydrazide, see: Xu (2012 ▶); Bakir & Green (2002 ▶). For hydrogen-bond motifs, see: Bernstein et al. (1995 ▶). For standard bond lengths, see: Allen et al. (1987 ▶).
Source:
http://doi.org/10.1107/S1600536812026190