Acta Cryst. (2006). E62, o2697-o2699  [ doi:10.1107/S1600536806020368 ]

4,6-Dibenzoylisophthalic acid dimethyl sulfoxide disolvate

S. Liu, G.-L. Song, J.-M. Tang, W.-K. Xu and H.-J. Zhu

Abstract: In the crystal structure of the title compound, C₂₂H₁₄O₆··2C₂H₆OS, 4,6-dibenzoylisophthalic acid is connected to two dimethyl sulfoxide molecules by strong O-HO=S hydrogen bonds. Weak intermolecular C-HO hydrogen bonds connect molecules into dimers. Intramolecular three-centred C-HO hydrogen bonding is favoured by a syn conformation of both carboxyl groups. The two dimethyl sulfoxide molecules were found to be disordered over two equally populated sites.

Online 9 June 2006

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