Tellurium tetrabromide
Chemical compound / From Wikipedia, the free encyclopedia
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
Quick Facts Identifiers, Properties ...
Identifiers | |
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3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.030.070 |
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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] | |
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).
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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−