(IUCr) Crystallography Journals Online

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Acta Cryst. (2012). E68, o3349
[ doi:10.1107/S1600536812046247 ]

Quinolinium 8-hydroxy-7-iodoquinoline-5-sulfonate 0.8-hydrate

G. Smith

Abstract: In the crystal structure of the title hydrated quinolinium salt of ferron (8-hydroxy-7-iodoquinoline-5-sulfonic acid), C₉H₇N⁺·C₉H₅INO₄S^-·0.8H₂O, the quinolinium cation is fully disordered over two sites (occupancy factors fixed at 0.63 and 0.37) lying essentially within a common plane and with the ferron anions forming [pi] - [pi] -associated stacks down the b axis [minimum ring centroid separation = 3.462 (6) Å]. The cations and anions are linked into chains extending along c through hydroxy O-HO and quinolinium N-HO hydrogen bonds to sulfonate O-atom acceptors which are also involved in water O-HO hydrogen-bonding interactions along b, giving a two-dimensional network.