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| Names | |
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| Other names Tungsten(IV) chloride oxide | |
| Identifiers | |
3D model (JSmol) | |
| ECHA InfoCard | 100.033.497  |
PubChem CID | |
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SMILES
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| Properties | |
Chemical formula | WOCl4 |
| Molar mass | 341.651 g/mol |
| Appearance | red crystals |
| Density | 11.92 g/cm3 |
| Melting point | 211 °C (412 °F; 484 K) |
| Boiling point | 227.55 °C (441.59 °F; 500.70 K) |
| reacts | |
| Solubility | soluble in benzene and CS2 |
| Hazards | |
EU classification (DSD) (outdated) | not listed |
| Related compounds | |
Other anions | Tungsten(VI) oxytetrafluoride Tungsten(VI) oxytetrabromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Tungsten(VI) oxytetrachloride is the inorganic compound with the formula WOCl4. This diamagnetic solid is used to prepare other complexes of tungsten. The yellow-green compound is soluble in nonpolar solvents but it reacts with alcohols and water and forms adducts with Lewis bases.
Structure
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Structure of solid WOCl4, illustrating its polymeric structure with short W≡O and weak W---O bonds in the chains. Color code: O = red.
The solid consists of weakly associated square pyramidal monomers.[1] The compound is classified as an oxyhalide.
Synthesis and reactions
WOCl4 is prepared from tungsten trioxide:[2]
WOCl4 is Lewis acidic. It is a precursor to catalysts used for polymerization of alkynes.[3]
References
- ^ Hess, H.; Hartung, H. (1966). "Die Kristallstruktur von Wolframoxidchlorid WOCl4 und Wolframoxidbromid WOBr4". Z. Anorg. Allg. Chem. 34 (3–4): 157–166. doi:10.1002/zaac.19663440306.
- ^ Nielson, A. J. (1985). "Tungsten and Molybdenum Tetrachloride Oxides". Inorganic Syntheses. Inorg. Synth. Inorganic Syntheses. 23. pp. 195–198. doi:10.1002/9780470132548.ch41. ISBN 9780470132548.
- ^ Hayano, S.; Masuda, T. (1999). "Living Polymerization of [o-(Trifluoromethyl)phenyl]acetylene by WOCl4-Based Catalysts such as WOCl4-n-Bu4Sn-t-BuOH (1:1:1)". Macromolecules. 32: 7344–7348. doi:10.1002/zaac.19663440306.