2-Bromoacetoxybenzoic Acid, a Brominated Aspirin Analog

The crystal structure of 2-bromoacetoxybenzoic acid, C₉H₇BrO₄, shows it to be a close structural analog of aspirin. The carboxylic acid moiety is twisted by 7.7 (4)° out of the plane of the aromatic ring. The acetyl group, like that of aspirin, shows bond-angle distortions from ideal values while remaining essentially planar. The Br atom is rotationally disordered and has been modeled as occupying two sites related by a 13 (1)° rotation about the C8-C9 bond.

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