Tellurium tetrabromide

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

Tellurium tetrabromide

Tellurium tetrabromide
Identifiers
CAS Number	10031-27-3
3D model (JSmol)	Interactive image
ChemSpider	74282
ECHA InfoCard	100.030.070
EC Number	233-090-7
PubChem CID	82311
UNII	7A29EFJ1AF Y
CompTox Dashboard (EPA)	DTXSID5064914
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)[1]
Boiling point	decomposes at 420 °C (788 °F; 693 K)
Structure
Crystal structure	monoclinic
Hazards
GHS labelling:[2]
Pictograms
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 [77 °F], 100 kPa). Infobox references

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⁻