Tungsten(VI) oxytetrachloride
| Names | |
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| Other names
Tungsten(VI) tetrachloride oxide
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.033.497 |
| EC Number |
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PubChem CID
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| Properties | |
| 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 | |
| GHS labelling:[1] | |
| Warning | |
| H315, H319, H335 | |
| P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501 | |
| Related compounds | |
Other anions
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Tungsten(VI) oxytetrafluoride Tungsten(VI) oxytetrabromide |
Other cations
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Molybdenum oxytetrachloride |
Related compounds
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Tungsten dichloride dioxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Tungsten(VI) oxytetrachloride is the inorganic compound with the formula WOCl4. This diamagnetic solid is used to prepare other complexes of tungsten. The red crystalline compound is soluble in nonpolar solvents but it reacts with alcohols and water and forms adducts with Lewis bases.
Structure
The solid consists of weakly associated square pyramidal monomers.[2] The compound is classified as an oxyhalide.
Synthesis and reactions
WOCl4 is prepared from tungsten trioxide or hexachloride:[3]
- WO3 + 2 SOCl2 → WOCl4 + 2 SO2
- WCl6 + ((CH3)3Si)2O → WOCl4 + 2 (CH3)3SiCl
It is "difficult to prepare by other means,"[4] but thionyl chloride also oxidizes tungsten(IV) oxide to the oxytetrachloride at 200 °C.[5]
WOCl4 is a Lewis acid. It is a precursor to catalysts used for polymerization of alkynes.[6]
References
- ^ "Tungsten tetrachloride oxide". pubchem.ncbi.nlm.nih.gov. Retrieved 12 December 2021.
- ^ 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. (2007). "Tungsten and Molybdenum Tetrachloride Oxides". Inorganic Syntheses. Vol. 23. pp. 195–198. doi:10.1002/9780470132548.ch41. ISBN 9780470132548.
- ^ Audrieth, Ludwig F.; Kleinberg, Jacob (1953). Non-aqueous solvents. New York: John Wiley & Sons. p. 224. LCCN 52-12057.
- ^ Groh, Matthias F.; Müller, Ulrike; Ahmed, Ejaz; Rothenberger, Alexander; Ruck, Michael (2013) [June 3, 2013]. "Substitution of conventional high-temperature syntheses of inorganic compounds by near-room-temperature syntheses in ionic liquids". Zeitschrift für Naturforschung. 68b (10). Tübingen: Verlag der Zeitschrift für Naturforschung: 1116. doi:10.5560/ZNB.2013-3141.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ 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.