Research Article: 5-Chloro-2-nitro­phenol

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): Dong-mei Ren.


The asymmetric unit of the title compound, C6H4ClNO3, contains two independent mol­ecules in which the dihedral angles between the benzene ring and the nitro groups are 2.5 (1) and 8.5 (1)°. Intra­molecular O—H⋯O hydrogen bonds involving the hy­droxy and nitro substituents result in the formation of S(6) six-membered rings. In the crystal, O—H⋯O, O—H⋯Cl and C—H⋯O hydrogen bonds together with Cl⋯O contacts [3.238 (3) and 3.207 (3) Å] generate a three-dimensional network.

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For background to applications of the title compound and its synthesis, see: Richard (1971 ▶). For bond-length data, see: Allen et al. (1987 ▶) and for hydrogen-bond motifs, see: Bernstein et al. (1995 ▶).