title: Crystal structure of 3-bromo-2-hy-droxy-benzoic acid.
abstract: Mutual carbox-yl-carboxyl O-H⋯O hydrogen bonds link the mol-ecules of the title compound, C7H5BrO3, into centrosymmetric dimers which display a central R 2 (2)(8) ring motif. In addition, there is an intra-molecular hydrox-yl-carboxyl O-H⋯O inter-action present. A comparison with the crystal structures of 59 other substituted derivatives of salicylic acid shows that both the centrosymmetric carbox-yl-carboxyl O-H⋯O dimer and the stacking mode of mol-ecules along the short a axis observed in the title structure are frequent packing motifs in this set.
authors.affiliation: University of Innsbruck, Faculty of Chemistry and Pharmacy, Innrain 80, 6020 Innsbruck, Austria.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Laus
authors.affiliation: University of Innsbruck, Institute of Mineralogy and Petrography, Innrain 52, 6020 Innsbruck, Austria.
authors.forename: Volker
authors.initials: V
authors.lastname: Kahlenberg
authors.affiliation: University of Innsbruck, Faculty of Chemistry and Pharmacy, Innrain 80, 6020 Innsbruck, Austria.
authors.forename: Thomas
authors.initials: T
authors.lastname: Gelbrich
authors.affiliation: Sandoz GmbH, Biochemiestrasse 10, 6250 Kundl, Austria.
authors.forename: Sven
authors.initials: S
authors.lastname: Nerdinger
authors.affiliation: University of Innsbruck, Faculty of Chemistry and Pharmacy, Innrain 80, 6020 Innsbruck, Austria.
authors.forename: Herwig
authors.initials: H
authors.lastname: Schottenberger
keywords: XPac; crystal structure; hydrogen bonding; salicylic acid derivative; structural systematics