Bis(3-carboxy­anilinium) hexa­fluoro­stannate(IV)

The title compound, (C₇H₈NO₂)₂[SnF₆], has been prepared from 3-amino­benzoic acid and tin(II) fluoride in hydro­fluoric acid. The structure can be described as alternating layers of SnF₆^2- and C₇H₈NO₂⁺ ions along the a axis, with the SnF₆^2- ions lying on a twofold axis. The cations and anions are linked to each other through strong hydrogen bonds formed by all H atoms covalently bonded to the N and O atoms. This three-dimensional complex network of hydrogen bonds reinforces the cohesion of the ionic structure.

Bis­(adeninium) hexa­chloro­stannate(IV) dichloride tetrahydrate

The structure of the title compound, (C₅H₇N₅)₂[SnCl₆]Cl₂·4H₂O, can be described as alternating layers of C₅H₇N₅²⁺ and [SnCl₆]^2- ions along the b axis, the Sn^IV atom lying on a twofold axis. The chloride ions are located between the organic entities, forming hydrogen bonds with the N atoms and water molecules. Layers of adeninium cations and hexa­chloro­stannate anions are linked by anion-cation, cation-water and water-water hydrogen bonds. This three-dimensional complex network of hydrogen bonds ensures the cohesion of the ionic structure.

Bis(cytosinium) hexa­chloro­stannate(IV)

The asymmetric unit of the title compound, (C₄H₆N₃O)₂[SnCl₆], contains one cytosinium cation and half a [SnCl₆]²⁻ anion, the anion lying on an inversion centre. The structure can be described as alternating layers of cytosinium and hexa­chloro­stannate ions along the c axis. The packing is stabilized by N—H...Cl and N—H...O hydrogen bonding, resulting in the formation of a two-dimensional network.