Tungsten dichloride dioxide

Source: Wikipedia, the free encyclopedia.
Tungsten dichloride dioxide
Tungsten(VI) dioxydichloride
Names
IUPAC name
Tungsten(VI) dichloride dioxide
Other names
  • Tungsten(VI) dioxydichloride
  • Tungsten dichloride dioxide
  • Tungstyl chloride
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.033.496 Edit this at Wikidata
EC Number
  • 236-862-1
  • InChI=1S/2ClH.2O.W/h2*1H;;;/q;;2*-2;/p-2
    Key: DVBXMVWZPVBSJY-UHFFFAOYSA-L
  • InChI=1S/2ClH.2O.W/h2*1H;;;/q;;2*-2;/p-2
  • [O-2].[O-2].[Cl-].[Cl-].[W]
Properties
WO2Cl2
Molar mass 286.74 g·mol−1
Appearance Yellow-red crystals
Density 4.67 g/cm3
Melting point 265 °C (509 °F; 538 K)
Boiling point
Sublimes at > 350 °C in vacuum
decomposes
Solubility slightly soluble in ethanol
Structure
orthorhombic
Hazards
GHS labelling:[1]
GHS07: Exclamation mark
Warning
H315, H319, H335
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Tungsten dichloride dioxide, or Tungstyl chloride is the chemical compound with the formula WO2Cl2. It is a yellow-colored solid. It is used as a precursor to other tungsten compounds. Like other tungsten halides, WO2Cl2 is sensitive to moisture, undergoing hydrolysis.

Preparation

WO2Cl2 is prepared by ligand redistribution reaction from tungsten trioxide and tungsten hexachloride:

2 WO3 + WCl6 → 3 WO2Cl2

Using a two-zone tube furnace, a vacuum-sealed tube containing these solids is heated to 350 °C. The yellow product sublimes to the cooler end of the reaction tube. No redox occurs in this process.[2] An alternative route highlights the oxophilicity of tungsten:[3]

WCl6 + 2 ((CH3)3Si)2O → 3 WO2Cl2 + 4 (CH3)3SiCl

This reaction, like the preceding one, proceeds via the intermediacy of WOCl4.

Structure

Gaseous tungsten dichloride dioxide is a monomer.[4] Solid tungsten dichloride dioxide is a polymer consisting of distorted octahedral W centres. The polymer is characterized by two short W-O distances, typical for a multiple W-O bond, and two long W-O distances more typical of a single or dative W-O bond.[5]

Related oxy halides

Tungsten forms a number of

oxyhalides including WOCl4, WOCl3, WOCl2. The corresponding bromides (WOBr4, WOBr3, WOBr2) are also known as is WO2I2.[6]

Reactions

Structure of the complex WO2Cl2(dimethoxyethane).

WO2Cl2 is a

Lewis acid, forming soluble adducts of the type WO2Cl2L2, where L is a donor ligand such as bipyridine and dimethoxyethane. Such complexes often cannot be prepared by depolymerization of the inorganic solid, but are generated in situ from WOCl4.[7]

References

  1. ^ "C&L Inventory". echa.europa.eu. Retrieved 12 December 2021.
  2. ISBN 9780470132456. {{cite book}}: |journal= ignored (help
    )
  3. doi:10.1016/S0277-5387(00)86336-6
    .
  4. doi:10.1021/ic50070a020
    .
  5. doi:10.1002/zaac.19683630108
  6. ISBN 0-12-352651-5
    .
  7. doi:10.1016/S0277-5387(00)86203-8
Stub icon

This inorganic compound–related article is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Tungsten_dichloride_dioxide&oldid=1173417670"