Tellurium tetrabromide
General | ||||||||||||||||
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Surname | Tellurium tetrabromide | |||||||||||||||
other names |
Tellurium (IV) bromide |
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Molecular formula | TeBr 4 | |||||||||||||||
Brief description |
yellow to orange solid |
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properties | ||||||||||||||||
Molar mass | 447.27 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
4.31 g cm −3 |
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Melting point |
380 ° C |
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boiling point |
420 ° C (decomposition) |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Tellurium tetrabromide is an inorganic chemical compound of tellurium from the group of bromides .
Extraction and presentation
Tellurium tetrabromide can be obtained by reacting tellurium with bromine .
It is also possible to display it by reacting tellurium tetrachloride or tellurium dioxide (at 110 ° C.) with boron tribromide
or iodobromide with tellurium.
properties
Tellurium tetrabromide is a moisture-sensitive, hygroscopic, yellow to orange-colored, crystalline solid that decomposes on contact with water. It is soluble in ether and glacial acetic acid . In hydrobromic acid it is dissolved to form the hexbromidotelluric acid H 2 [TeBr 6 ], from which alkali salts such. B. the orange-red cesium hexabromidotellurate (IV) Cs 2 [TeBr 6 ] can be easily isolated. When heated, partial decomposition takes place with the release of bromine, which is why the compound cannot be melted or distilled without decomposition at normal pressure. In the solid state tellurium tetrabromide has a structure of Kuban type which as of four linked via halide bridges TeBr 3 + Br - can be described assembled units.
Individual evidence
- ↑ a b c Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 435.
- ↑ a b c d e f data sheet Tellurium (IV) bromide, ultra dry, 99.999% (metals basis) from AlfaAesar, accessed on December 15, 2013 ( PDF )(JavaScript required) .
- ↑ a b J. J. Zuckerman: Inorganic Reactions and Methods, The Formation of Bonds to Halogens . John Wiley & Sons, 2009, ISBN 0-470-14538-2 , pp. 68,100,191 ( limited preview in Google Book Search).
- ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 632.