Tellurium tetraiodide

Tellurium tetraiodide (TeI₄) is an inorganic chemical compound. It has a tetrameric structure which is different from the tetrameric solid forms of TeCl₄ and TeBr₄. In TeI₄ the Te atoms are octahedrally coordinated and edges of the octahedra are shared.

TeI₄ can be prepared from the elements or by reacting Te and iodomethane, CH₃I. In the vapour TeI₄ dissociates:

It is a conductor when molten, dissociating into the ions TeI₃⁺ and I⁻. In solvents with donor properties such as acetonitrile, CH₃CN ionic complexes are formed which make the solution conducting: