Tungsten (VI) dioxide dichloride
| Structural formula | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||
| General | |||||||||||||||||||
| Surname | Tungsten (VI) dioxide dichloride | ||||||||||||||||||
| other names |
Tungsten oxychloride |
||||||||||||||||||
| Molecular formula | WO 2 Cl 2 | ||||||||||||||||||
| Brief description |
colorless to yellowish solid |
||||||||||||||||||
| External identifiers / databases | |||||||||||||||||||
|
|||||||||||||||||||
| properties | |||||||||||||||||||
| Molar mass | 286.74 g mol −1 | ||||||||||||||||||
| Physical state |
firmly |
||||||||||||||||||
| Melting point |
266 ° C |
||||||||||||||||||
| solubility |
Decomposes in water |
||||||||||||||||||
| safety instructions | |||||||||||||||||||
|
|||||||||||||||||||
| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | |||||||||||||||||||
Tungsten (VI) dioxide dichloride is an inorganic chemical compound of tungsten from the group of oxide chlorides .
Extraction and presentation
Tungsten (VI) dioxide dichloride can be obtained by reacting tungsten (VI) chloride or tungsten (VI) oxide tetrachloride with tungsten (VI) oxide .
It can also be produced by reacting carbon tetrachloride with tungsten (IV) oxide at 250 ° C.
properties
Tungsten (VI) dioxide dichloride is in the form of colorless to pale yellow crystal flakes. It hydrolyzes in humid air to turn yellow and decomposes in water. It has a monoclinic crystal structure with the space group Aa (space group no. 9, position 4) , isotype to that of tungsten (VI) dioxide diiodide WO 2 I 2 (a = 768 pm, b = 389 pm, c = 1390 pm, β = 105.3 °).
Individual evidence
- ↑ a b c d 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. 1569.
- ↑ a b c data sheet Tungsten (VI) dichloride dioxide, 99% from Sigma-Aldrich , accessed on July 13, 2013 ( PDF ).
- ^ A b Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 441 ( limited preview in Google Book search).