Tellurium tetrabromide
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| ECHA InfoCard | 100.030.070  |
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| 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 | |
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| 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 | |
Chemical compound
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
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−
References
- ^ Thermochemical Data of Elements and Compounds", M. Binnewies, E. Milke, Wiley-VCH, 2002, ISBN 3-527-30524-6
- ^ "C&L Inventory". echa.europa.eu.
- ^ a b c Inorganic Chemistry,Egon Wiberg, Arnold Frederick Holleman Elsevier 2001 ISBN 0-12-352651-5
- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
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