Crystal structure of 2-(1-o-xylen-4′-yl-2-hydroxy-5-oxo-benzo[c]pyrroline) carboxylic acid, C17H15NO4

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The title compound crystallizes in the space group P21/c, with a = 8.555(2), b = 22.109(2), c = 16.768(2) Å, and β = 90.25(2)°, with two independent molecules in the asymmetric unit, dissimilar only for the orientation of the xylenyl group. There is no conjugation between the pyrroline ring and the xylenyl group. The molecules in the asymmetric unit are enantiomers, thus constituting a racemic dimer. The molecules are linked in chains by hydrogen bonds.

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