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Acta Cryst. (2012). E68, o146  [ doi:10.1107/S1600536811051865 ]

3-Carboxymethyl-1H-indole-4-carboxylic acid

S. Mao

Abstract: In the title compound, C11H9NO4, the carboxyl group bonded to the six-membered ring lies close to the plane of the 1H-indole ring system [dihedral angle = 13.13 (9)°], whereas the carboxylic acid group linked to the five-membered ring by a methylene bridge is close to perpendicular [78.85 (9)°]. In the crystal, O-H...O and N-H...O hydrogen bonds link the molecules, generating (110) sheets.

Online 17 December 2011

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