Acta Cryst. (2009). E65, o954  [ doi:10.1107/S1600536809011830 ]

A redetermination of 2-nitrobenzoic acid

G. Portalone

Abstract: The crystal structure of the title compound, C₇H₅NO₄, was first reported by Kurahashi, Fukuyo & Shimada [(1967). Bull. Chem. Soc. Jpn, 40, 1296]. It has been re-examined, improving the precision of the derived geometric parameters. The asymmetric unit comprises a non-planar independent molecule, as the nitro and the carboxy substituents force each other to be twisted away from the plane of the aromatic ring by 54.9 (2) and 24.0 (2)°, respectively. The molecules form a conventional dimeric unit via centrosymmetric intermolecular hydrogen bonds.

Online 2 April 2009

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