Tellurium tetrabromide

Tellurium tetrabromide

Identifiers
CAS Number	10031-27-3
ChemSpider	74282
Jmol 3D model	Interactive image
PubChem	82311
InChI InChI=1S/Br4Te/c1-5(2,3)4 Key: PTYIPBNVDTYPIO-UHFFFAOYSA-N
SMILES Br[Te](Br)(Br)Br
Properties
Chemical formula	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)
Boiling point	decomposes at 420 °C (788 °F; 693 K)
Structure
Crystal structure	monoclinic
Vapor pressure	{{{value}}}
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. 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⁻ Solutions in benzene and toluene are non conducting and TeBr₄ is present as the 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⁻