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.[2]
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3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| Te2Br | |
| Molar mass | 335.10 g·mol−1 |
| Appearance | Gray crystalline solid |
| Melting point | 224 °C[1] |
| Related compounds | |
Other anions
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tritellurium dichloride |
Other cations
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selenium dibromide |
Related compounds
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tellurium tetrabromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation and properties
editTe2Br 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. The corresponding chloride and iodide, Te2Cl and Te2I, are also known.[3]
Other tellurium bromides include the yellow liquid Te2Br2, the orange solid TeBr4,[4] and the greenish-black solid TeBr2.[5] Complexes of the type TeBr2(thiourea)2 are well characterized.[6]
References
edit- ^ Yaws, Carl (2015). The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals (2nd ed.). Gulf Professional Publishing. ISBN 978-0-12-800834-8.
- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
- ^ R. Kniep, D. Mootz, A. Rabenau "Zur Kenntnis der Subhalogenide des Tellurs" Zeitschrift für anorganische und allgemeine Chemie 1976, Volume 422, pages 17–38. doi:10.1002/zaac.19764220103
- ^ 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 doi:10.1039/9781847557575-00455
- ^ Rogers, Max; Spurr, Robert (September 1947). "The Structure of Tellurium Dibromide". Journal of the American Chemical Society. 69 (9): 2102–2103. doi:10.1021/ja01201a007.
- ^ Foss, Olav; Maartmann-Moe, Knut (1987). "Complexes of Tellurium Dichloride, Dibromide and Diiodide with Thiourea and Tetramethylselenourea, TeL2X2. X-Ray Crystal Structures". Acta Chemica Scandinavica. 41a: 121–129. doi:10.3891/acta.chem.scand.41a-0121.
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