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The title compound, [Sr(C9H5INO4S2)2(H2O)2]·H2O, is isomorphous with the corresponding calcium complex of ferron (8-hydroxy-7-iodo­quinoline-5-sulfonic acid). The asymmetric unit consists of one SrII ion, two organic ligands, two coordinated water mol­ecules and one uncoordinated water mol­ecule. The SrII ion has a pentagonal–bipyramidal coordination geometry made up of O atoms of three different sulfonate groups, deprotonated quinolinol O atoms of two different oxine rings and two water mol­ecules. In the ligands of type I, two O atoms of the sulfonate group are involved in coordination, whereas in type II ligands, only one O atom is involved. Ligands of type I are stacked on top of one another, each pair of adjacent members of the stack being related by an inversion centre. Ligands of type II are also stacked in a similar manner. These molecular stacks are cross-linked by Sr—O(sulfonate) and Sr—O(quinolinol) bonds, leading to an extended framework. This architecture is further stabilized by a number of O—H⋯O and N—H⋯O hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the crystal structure of the title compound, C6H10N3+·Br−·C6H9N3·H2O, the asymmetric unit contains a 2-amino-4,6-di­methyl­pyrimidinium cation, a Br− anion, a neutral 2-amino-4,6-di­methyl­pyrimidine mol­ecule and a water mol­ecule. Each neutral base molecule is paired with another inversion-related molecule through N—H⋯N hydrogen bonds to form dimers, and these are linked to one another through water-mediated hydrogen bonds, generating a supramolecular ribbon. The cations also pair with one another through N—H⋯N hydrogen bonds. The cation pairs are stacked on top of the neutral pairs. The Br− anion also takes part in hydrogen bonding (N/O—H⋯Br). [ABSTRACT FROM AUTHOR]