Tellurium tetrabromide
Tellurium tetrabromide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.070
EC Number
  • 233-090-7
UNII
  • InChI=1S/Br4Te/c1-5(2,3)4
    Key: PTYIPBNVDTYPIO-UHFFFAOYSA-N
  • Br[Te](Br)(Br)Br
Properties
TeBr4
Molar mass 447.22 g/mol
Appearance yellow-orange crystals
Density 4.3 g/cm3, solid
Melting point 388 °C (730 °F; 661 K)[1]
Boiling point decomposes at 420 °C (788 °F; 693 K)
Structure
monoclinic
Hazards
GHS labelling:[2]
GHS05: CorrosiveGHS06: Toxic
Danger
H301, H314
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 [77 °F], 100 kPa).
Infobox references

Tellurium tetrabromide (TeBr4) is an inorganic chemical compound. It has a similar tetrameric structure to TeCl4.[3] It can be made by reacting bromine and tellurium.[4] In the vapour TeBr4 dissociates:[3]

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.[3] 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. 1 2 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.


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