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 ;
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)
Boiling point	decomposes at 420 °C (788 °F; 693 K)
Structure
Crystal structure	monoclinic
Hazards
	GHS labelling:
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

Tellurium tetrabromide (Te Br₄) 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⁻

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