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Tellurium tetrabromide

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Tellurium tetrabromide
Tellurium tetrabromide
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.070 Edit this at Wikidata
EC Number
  • 233-090-7
PubChem CID
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/Br4Te/c1-5(2,3)4Key: PTYIPBNVDTYPIO-UHFFFAOYSA-N
SMILES
  • Br(Br)(Br)Br
Properties
Chemical formula TeBr4
Molar mass 447.22 g/mol
Appearance yellow-orange crystals
Density 4.3 g/cm, solid
Melting point 388 °C (730 °F; 661 K)
Boiling point decomposes at 420 °C (788 °F; 693 K)
Structure
Crystal structure monoclinic
Hazards
GHS labelling:
Pictograms GHS05: CorrosiveGHS06: Toxic
Signal word Danger
Hazard statements H301, H314
Precautionary statements P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
Related compounds
Other anions Tellurium tetrafluoride
Tellurium tetrachloride
Tellurium tetraiodide
Other cations Selenium tetrabromide
Related compounds Ditellurium bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Tellurium tetrabromide (TeBr4) is an inorganic chemical compound. It has a similar tetrameric structure to TeCl4. It can be made by reacting bromine and tellurium. In the vapour TeBr4 dissociates:

TeBr4 → TeBr2 + Br2

It is a conductor when molten, dissociating into the ions TeBr3 and Br. When dissolved in benzene and toluene, TeBr4 is present as the unionized tetramer Te4Br16. In solvents with donor properties such as acetonitrile, CH3CN ionic complexes are formed which make the solution conducting:

TeBr4 + 2CH3CN → (CH3CN)2TeBr3 + Br

References

  1. Thermochemical Data of Elements and Compounds, M. Binnewies, E. Milke, Wiley-VCH, 2002, ISBN 3-527-30524-6
  2. "C&L Inventory". echa.europa.eu.
  3. ^ Inorganic Chemistry,Egon Wiberg, Arnold Frederick Holleman Elsevier 2001 ISBN 0-12-352651-5
  4. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
Tellurium compounds
Bromine compounds
Br(−I)
Br(−I,I)
Br(I)
Br(II)
Br(I,V)
Br(III)
Br(IV)
Br(V)
Br(VII)


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