Abstract

The title compound, [SnBr4(H2O)2]·3H2O, forms large colourless crystals in originally sealed samples of tin tetra­bromide. It constitutes the first structurally characterized hydrate of SnBr4 and is isostructural with the corresponding ­hydrate of SnCl4. It is composed of SnIV 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.

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