title: Cystal structre of 5-hy-droxy-2-nitro-benzaldehyde.
abstract: In the title compound, C7H5NO4, the nitro group and the aldehyde group are inclined to the benzene ring by 16.6 (3) and 15.6 (3)°, respectively. In the crystal, mol-ecules are linked via O-H⋯O hydrogen bonds, forming chains along [100]. The chains are linked by C-H⋯O hydrogen bonds, forming a three-dimensional structure.
authors.affiliation: H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
authors.forename: Huma
authors.initials: H
authors.lastname: Bano
authors.affiliation: H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
authors.forename: Sammer
authors.initials: S
authors.lastname: Yousuf
keywords: C—H⋯O hydrogen bonds; O—H⋯O hydrogen bonds; crystal structure; nitro-substituted aromatics