Tungsten(VI) oxytetrachloride

Tungsten(VI) oxytetrachloride
Names
Other names
Tungsten(IV) chloride oxide
Identifiers
13520-78-0 YesY
Jmol interactive 3D Image
PubChem 19596810
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
not listed
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
YesY verify (what is YesYN ?)
Infobox references

Tungsten(VI) oxytetrachloride is the inorganic compound with the formula WOCl4. This diamagnetic solid is used to prepare other complexes of tungsten. The orange-coloured compound is soluble in nonpolar solvents but it reacts with alcohols and water and forms adducts with Lewis bases. The solid consists of weakly associated square pyramidal monomers.[1] The compound is classified as an oxyhalide.

WOCl4 is prepared from tungsten trioxide:[2]

WO3 + 2 SOCl2 → WOCl4 + 2 SO2
WCl6 + (Me3Si)2O → WOCl4 + 2 Me3SiCl

Reactions

WOCl4 is Lewis acidic. It is a precursor to catalysts used for polymerization of alkynes.[3]

References

  1. Hess, H.; Hartung, H. (1966). "Die Kristallstruktur von Wolframoxidchlorid WOCl4 und Wolframoxidbromid WOBr4". Z. anorg. allgem. Chem. 34: 157–166. doi:10.1002/zaac.19663440306.
  2. Nielson, A. J. (1985). "Tungsten and Molybdenum Tetrachloride Oxides". Inorg. Synth. 23: 195–198. doi:10.1002/9780470132548.ch41.
  3. 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.


This article is issued from Wikipedia - version of the Monday, November 02, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.