Research Article: 1H-Pyrrole-2-carboxylic acid

Date Published: May 01, 2009

Publisher: International Union of Crystallography

Author(s): Gui Hong Tang, Dong Dong Li, Gang Huang, Xing Yan Xu, Xiang Chao Zeng.


In the title compound, C5H5NO2, the pyrrole ring and its carboxyl substituent are close to coplanar, with a dihedral angle of 11.7 (3)° between the planes. In the crystal structure, adjacent mol­ecules are linked by pairs of O—H⋯O hydrogen bonds to form inversion dimers. Additional N—H⋯O hydrogen bonds link these dimers into chains extending along the a axis.

Partial Text

For pyrroles sourced from marine organisms, see: Faulkner (2002 ▶). For the bioactivity of pyrrole derivatives, see: Banwell et al. (2006 ▶); Sosa et al. (2002 ▶). For related structures, see: Zeng (2006 ▶); Zeng et al. (2007 ▶). For graph-set motifs, see: Bernstein et al. (1995 ▶).




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