Diaqua­tetra­bromidotin(IV) trihydrate

The title compound, [SnBr(4)(H(2)O)(2)]·3H(2)O, forms large colourless crystals in originally sealed samples of tin tetra­bromide. It constitutes the first structurally characterized hydrate of SnBr(4) and is isostructural with the corresponding ­hydrate of SnCl(4). It is composed of Sn(IV) atoms octa­hedrally coordinated by four Br atoms and two cis-related water mol­ecules. The octa­hedra exhibit site symmetry 2. They are arranged into columns along [001] via medium–strong O—H⋯O hydrogen bonds involving the two lattice water mol­ecules (one situated on a twofold rotation axis) while the chains are inter­connected via longer O—H⋯Br hydrogen bonds, forming a three-dimensional network.