organic compounds
Open access
In title compound, C10H12O4, all of the non-H atoms lie approximately in a plane with the largest deviation being 0.061 (2) Å. An intramolecular O—HO hydrogen bond generates an S(6) ring motif. No classical intermolecular hydrogen bonding occurs, with only van der Waals forces stabilizing the crystal structure.
organic compounds
Open access
The title compound, C10H7ClN2, contains two approximately planar molecules, A and B (r.m.s. deviations = 0.039 and 0.064 Å, respectively) in the asymmetric unit. In the crystal, N—HN hydrogen bonds link the molecules into C(7) chains of alternating A and B molecules propagating along the a-axis direction. The crystal used for the data collection was found to be a racemic twin.