Received 30 October 2012
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 --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.
For the crystal structure of ferron, see: Balasubramanian & Muthiah (1996). For analytical applications of ferron, see: Vogel (1964). For the crystal structures of other non-zwitterionic compounds of ferron, see: Hemamalini et al. (2004); Smith et al. (2004, 2007).
Data collection: CrysAlis PRO (Agilent, 2012); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 2012); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SU2523 ).
The author acknowledges financial support from the Science and Engineering Faculty and the University Library, Queensland University of Technology.
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