Date Published: April 01, 2011
Publisher: International Union of Crystallography
Author(s): Kou-Lin Zhang, Jin-Bo Zhang, Seik Weng Ng.
The aromatic rings of the N,N′-dioxide molecule in the title compound, C8H4NI3O4·C10H8N2O2·H2O, are twisted by 14.0 (2)°. The –CO2H substituents of the 5-amino-2,4,6-triiodoisophthalic acid are twisted by 83.0 (2) and 86.5 (2)° out of the plane of the aromatic ring. In the crystal, the three components are linked by O—H⋯O hydrogen bonds into a three-dimensional network. An N—H⋯O interaction also occurs. One of the amino H atom is not involved in hydrogen bonding.
For the structure of the monohydrated carboxylic acid, see: Beck & Sheldrick (2008 ▶). For the 4,4′-bipyridinium 5-amino-2,4,6-triiodoisophthalate co-crystal of carboxylic acid, see: Zhang et al. (2010 ▶).