Ditellurium bromide

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Ditellurium bromide
Te2Br chain.png
Identifiers
3D model (JSmol)
PubChem CID
  • InChI=1S/Br.2Te
    Key: YFIRGYCOHWGSSA-UHFFFAOYSA-N
  • [Te].[Te].[Br]
Properties
Te2Br
Molar mass 335.10 g·mol−1
AppearanceGray crystalline solid
Melting point 224 °C [1]
Related compounds
Other anions
tritellurium dichloride
Other cations
selenium dibromide
Related compounds
 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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Ditellurium bromide is the inorganic compound with the formula Te 2 Br. 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]

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, [3] or reduction at room temperature of tellurium tetrabromide with tellurium metal in a tetrachloroaluminate ionic liquid. [4] The corresponding chloride and iodide, Te2Cl and Te2I, are also known. [3]

Other tellurium bromides include the yellow liquid Te2Br2, the orange solid TeBr4, [5] and the greenish-black solid TeBr2. [6] Complexes of the type TeBr2(thiourea)2 are well characterized. [7]

References

  1. ↑ Yaws, Carl (2015). The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals (2nd ed.). Gulf Professional Publishing. ISBN   978-0-12-800834-8.
  2. ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN   978-0-08-037941-8.
  3. 1 2 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
  4. ↑ Groh, Matthias F.; Müller, Ulrike; Ahmed, Ejaz; Rothenberger, Alexander; Ruck, Michael (2013) [June 3, 2013]. "Substitution of conventional high-temperature syntheses of inorganic compounds by near-room-temperature syntheses in ionic liquids". Zeitschrift für Naturforschung. 68b. Tübingen: Verlag der Zeitschrift für Naturforschung: 1109–1110. doi:10.5560/ZNB.2013-3141.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  5. ↑ 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
  6. ↑ Rogers, Max; Spurr, Robert (September 1947). "The Structure of Tellurium Dibromide". Journal of the American Chemical Society. 69 (9): 2102–2103. Bibcode:1947JAChS..69.2102R. doi:10.1021/ja01201a007.
  7. ↑ 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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