Date Published: July 01, 2012
Publisher: International Union of Crystallography
Author(s): M. Nawaz Tahir, Abdul Haleem Khan, Mohammad S. Iqbal, Christy Munir, Tariq Aziz.
In the title compound, C17H15N3O5S, the 2,3-dihydroxybenzaldehyde unit is oriented at a dihedral angles of 16.83 (10) and 78.87 (6)° with the anilinic and 5-methyl-1,2-oxazol-3-amine groups, respectively. An S(6) loop exists due to intramolecular O—H⋯N hydrogen bonding. In the crystal, inversion dimers with R22(8) rings are formed due to N—H⋯N hydrogen bonding between the 5-methyl-1,2-oxazol-3-amine groups. These dimers are interlinked by O—H⋯O hydrogen bonds, forming chains along  and resulting in R22(26) rings. π–π interactions occur between the central benzene rings with a centroid–centroid distance of 3.7928 (16) Å.
For related structures, see: Ebenezer & Muthiah (2010 ▶); Yildiz et al. (2010 ▶). For graph-set notation, see: Bernstein et al. (1995 ▶).