ditellurium bromide
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| ImageFile = Te2Br chain.png
| Verifiedfields = changed
| verifiedrevid =
| Name = Ditellurium bromide
| OtherNames =
| Section1 = {{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 12514-37-3
| PubChem = 163195843
| SMILES = [Te].[Te].[Br]
| StdInChI=1S/Br.2Te
| StdInChIKey=YFIRGYCOHWGSSA-UHFFFAOYSA-N
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| Section2 = {{Chembox Properties
| Formula = {{chem2|Te2Br}}
| Te=2|Br=1
| Appearance = Gray crystalline solid
| Density =
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| Section3 = {{Chembox Structure
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| Section7 = {{Chembox Hazards
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| Section8 = {{Chembox Related
| OtherAnions = tritellurium dichloride
| OtherCations = selenium dibromide
| OtherCompounds = tellurium tetrabromide
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}}
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.{{Greenwood&Earnshaw2nd}}
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.{{cite journal|title=Substitution of conventional high-temperature syntheses of inorganic compounds by near-room-temperature syntheses in ionic liquids|first1=Matthias F.|last1=Groh|first2=Ulrike|last2=Müller|first3=Ejaz|last3=Ahmed|first4=Alexander|last4=Rothenberger|first5=Michael|last5=Ruck|journal=Zeitschrift für Naturforschung|year=2013|volume=68b|pages=1109–1110|doi=10.5560/ZNB.2013-3141|orig-date=June 3, 2013|publisher=Verlag der Zeitschrift für Naturforschung|location=Tübingen}} 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. {{doi|10.1002/zaac.19764220103}}
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 {{doi|10.1039/9781847557575-00455}} and the greenish-black solid TeBr2.{{cite journal|doi=10.1021/ja01201a007|title=The Structure of Tellurium Dibromide|first1=Max|last1=Rogers|first2=Robert|last2=Spurr|journal=Journal of the American Chemical Society|date=September 1947|volume=69|number=9|pages=2102–2103|bibcode=1947JAChS..69.2102R }} Complexes of the type TeBr2(thiourea)2 are well characterized.{{cite journal|title=Complexes of Tellurium Dichloride, Dibromide and Diiodide with Thiourea and Tetramethylselenourea, TeL2X2. X-Ray Crystal Structures|author1=Foss, Olav |author2=Maartmann-Moe, Knut |journal=Acta Chemica Scandinavica|year=1987|volume=41a|pages= 121–129|doi=10.3891/acta.chem.scand.41a-0121|doi-access=free}}
References
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{{Tellurium compounds}}
{{bromides}}
{{Inorganic-compound-stub}}