In the structure of the title salt, 2C12H10N 3O4 +·C12H8O 6S2 2-·3H2O, determined at 173 K, the biphenyl-4,4′-disulfonate dianions lie across crystallographic inversion centres with the sulfonate groups inter-acting head-to-head through centrosymmetric cyclic bis-(water)-bridged hydrogen-bonding associations [graph set R 4 4(11)], forming chains. The 2-(2,4-dinitrobenzyl)pyridinium cations are linked to these chains through pyridinium-water N - H⋯O hydrogen bonds and a two-dimensional network is formed through water bridges between sulfonate and 2-nitro O atoms, while the structure also has weak cation-anion π-π aromatic ring interactions [minimum ring centroid separation = 3.8441 (13) Å].
|Number of pages||2|
|Journal||Acta Crystallographica Section E: Structure Reports Online|
|Issue number||Part 5|
|Publication status||Published - 14 Apr 2010|