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International Union of Crystallography, Acta Crystallographica Section E: Structure Reports Online, 1(64), p. o69-o70, 2007

DOI: 10.1107/s1600536807062381

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Bis(tetra­methyl­amonium) bis­(2,4,5-carboxy­benzoate)–benzene-1,2,4,5-tetra­carboxylic acid (1/1)

Journal article published in 2007 by Luís Cunha-Silva ORCID, Penka I. Girginova, Tito Trindade, Rocha João, Klinowski Jacek, Filipe A. Almeida Paz
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The asymmetric unit of the title compound, 2C4H12N+·2C10H5O8 −·C10H6O8, consists of a tetra­methyl­amonium cation, an anion derived from the singly deprotonated pyromellitic acid anion, 2,4,5-carboxy­benzoate (H3bta−), and one-half of a benzene-1,2,4,5-tetra­carboxylic acid (H4bta) mol­ecule, which has the centroid of the aromatic ring positioned at a crystallographic centre of inversion. The H4bta and H3bta− residues are involved in an extensive inter­molecular O—H⋯O hydrogen-bonding network, which leads to a three-dimensional supra­molecular structure containing one-dimensional channels running parallel to the [001] crystallographic direction. These channels house the tetra­methyl­amonium cations.