Tungsten(V) chloride
Names | |
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Other names
tungsten pentachloride
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Identifiers | |
3D model (
JSmol ) |
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ChemSpider | |
ECHA InfoCard
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100.235.076 |
EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
W2Cl10 | |
Molar mass | 361.1 g/mol |
Appearance | black crystals hygroscopic
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Density | 3.86 g/cm3 |
Melting point | 248 °C (478 °F; 521 K) |
Boiling point | 275.6 °C (528.1 °F; 548.8 K) |
+387.0·10−6 cm3/mol | |
Hazards | |
GHS labelling:[1] | |
Danger | |
H302, H314 | |
Related compounds | |
Related compounds
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Tungsten(IV) chloride Tungsten hexachloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tungsten(V) chloride is an
molybdenum pentachloride
.
Synthesis
The material is prepared by reduction of tungsten hexachloride. One method involves the use of tetrachloroethylene as the reductant[2]
- 2 WCl6 + C2Cl4 → W2Cl10 + C2Cl6
The blue green solid is volatile under vacuum and slightly soluble in nonpolar solvents. The compound is
Lewis bases
.
When the same reduction is conducted in the presence of tetraphenylarsonium chloride, one obtains instead the hexachlorotungstate(V) salt:[3]
- 2 WCl6 + Cl2C=CCl2 + 2 (C6H5)4AsCl → 2 (C6H5)4As[WCl6] + Cl3C−CCl3
Structure
The compound exists as a dimer, with a pair of octahedral tungsten(V) centres bridged by two chloride ligands. The W---W separation is 3.814 Å, which is non-bonding. The compound is isostructural with Nb2Cl10 and Mo2Cl10. The compound evaporates to give trigonal bipyramidal WCl5 monomers.[4]
References
- ^ "C&L Inventory". echa.europa.eu.
- ISBN 978-0-470-13172-5.
- .
- .