Ditellurium bromide is the inorganic compound with the formula Te2Br. It is one of the few stable lower bromides of tellurium. Unlike sulfur and selenium, tellurium forms families of polymeric subhalides where the halide/chalcogen ratio is less than 2.
Preparation and properties Te2Br is a gray solid. Its structure consists of a chain of Te atoms with Br occupying a doubly bridged site. It is prepared by heating tellurium with the appropriate stoichiometry of bromine near 215 °C, or reduction at room temperature of tellurium tetrabromide with tellurium metal in a tetrachloroaluminate ionic liquid. The corresponding chloride and iodide, Te2Cl and Te2I, are also known.R. Kniep, D. Mootz, A. Rabenau "Zur Kenntnis der Subhalogenide des Tellurs" Zeitschrift für anorganische und allgemeine Chemie 1976, Volume 422, pages 17–38.
Other tellurium bromides include the yellow liquid Te2Br2, the orange solid TeBr4,Zhengtao Xu "Recent Developments in Binary Halogen–Chalcogen Compounds, Polyanions and Polycations" in Handbook of Chalcogen Chemistry: New Perspectives in Sulfur, Selenium and Tellurium, Francesco Devillanova, Editor, 2006, RSC. pp. 381-416. Royal Society and the greenish-black solid TeBr2. Complexes of the type TeBr2(thiourea)2 are well characterized.
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