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International Union of Crystallography, Acta Crystallographica Section E: Structure Reports Online, 3(66), p. o524-o524, 2010

DOI: 10.1107/s160053681000396x

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Guanidinium 4-amino­benzoate

Journal article published in 2010 by P. S. Pereira Silva, M. Ramos Silva, J. A. Paixão ORCID, A. Matos Beja
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

In the title compound, CH6N3 +·C7H6NO2 −, the cation and anion lie on crystallographic mirror planes. The 4-amino­benzoate anion is almost in a planar conformation with a maximum deviation of 0.024 (2) Å for the N atom. The bond length in the deprotonated carboxyl group is inter­mediate between those of normal single and double Csp2=O bonds, indicating delocalization of the charge over both O atoms of the COO− group. In the crystal, N—H⋯O hydrogen bonds assemble the ions in layers propagating in the bc plane. This structure is very similar to that of guanidinium benzoate.