Tungsten (III) bromide
Crystal structure | |||||||
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__ W 3+ __ Br - | |||||||
General | |||||||
Surname | Tungsten (III) bromide | ||||||
other names |
Tungsten tribromide |
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Ratio formula | WBr 3 | ||||||
Brief description |
black solid |
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External identifiers / databases | |||||||
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properties | |||||||
Molar mass | 423.55 g mol −1 | ||||||
Physical state |
firmly |
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solubility |
almost insoluble in water |
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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 . |
Tungsten (III) bromide is an inorganic chemical compound of tungsten from the group of bromides .
Extraction and presentation
Tungsten (III) bromide can be obtained by reacting tungsten (II) bromide or its dihydrate with bromine at 50 ° C.
properties
Tungsten (III) bromide is a black, thermally unstable solid. From 180 ° C the decomposition into tungsten (II) bromide and bromine takes place in a vacuum. It is resistant to air and hydrogen and has limited solubility in carbon tetrachloride , acetonitrile and benzene . Its crystal structure is isotypic to that of tungsten (III) chloride ( trigonal , a = 1572 pm, c = 882 pm).
Individual evidence
- ↑ a b c d e Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 495 ( limited preview in Google Book search).
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ↑ a b Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1560.