Acta Cryst. (2004). E60, o1040-o1042  [ doi:10.1107/S1600536804011274 ]

The 1/1/1 adduct hydrate of 8-hydroxy-7-iodoquinoline-5-sulfonic acid (ferron) with urea

G. Smith, U. D. Wermuth and P. C. Healy

Abstract: The crystal structure of 8-hydroxy-7-iodoquinoline-5-sulfonic acid-urea-water, C₉H₆INO₄S·CH₄N₂O·H₂O, shows the zwitterionic (quinoline-sulfonate group) ferron molecule lying in a crystallographic mirror plane which related two of the sulfonate O atoms. Both the urea and the water molecule lie across the same plane and are inter-associated with the ferron molecules both within and between the planes by extensive hydrogen bonding, involving most available donor and acceptor sites on all three molecules. This includes a cyclic R₂²(8) sulfonate-urea association. The result is a three-dimensional layered structure.

Online 22 May 2004

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