Tellurium tetrabromide

Tellurium tetrabromide
Identifiers
CAS number 10031-27-3
PubChem 82311
ChemSpider 74282
Jmol-3D images Image 1
Properties
Molecular formula TeBr4
Molar mass 447.22 g/mol
Appearance yellow-orange crystals
Density 4.3 g/cm³, solid
Melting point

388°C
Boiling point

decomposes @420°C
Structure
Crystal structure monoclinic
Hazards
EU classification not listed
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Tellurium tetrabromide (TeBr4) is an inorganic chemical compound. It has a similar tetrameric structure to TeCl4.[1] It can be made by reacting bromine and tellurium.[2]. In the vapour TeBr4 dissociates[1] :

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.[1]. 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. ^ a b c Inorganic Chemistry,Egon Wiberg, Arnold Frederick Holleman Elsevier 2001 ISBN 0-12-352651-5
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Oxford: Butterworth-Heinemann. ISBN 0080379419.