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Disodium 4,5,6-trihy-droxy-benzene-1,3-disulfonate dihydrate
E Song1, J Podschun, H Wilberts
1Institute of Chemistry, Barbarastrasse 7, D-49069 Osnabrück, Germany.
Abstract:
In the title compound, 2Na(+)·C(6)H(4)O(9)S(2) (2-)·2H(2)O, the benzene rings of the 4,5,6-trihy-droxy-benzene-1,3-disulfonate ions, which are stacked parallel to each other forming rods parallel to the a axis, are slightly deformed (planarity, symmetry) mainly because of the high degree of substitution. The two sodium ions, located within pockets of the anion rods, are coordinated by six and seven O atoms, resulting in octa-hedral and penta-gonal-bipyramidal coordinations, respectively. In addition to these coordinative bonds towards sodium, an extended network of intra- and inter-molecular hydrogen bonds occurs.
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