Tungsten(III) chloride

Tungsten(III) chloride
Identifiers
3D model (JSmol)
  • InChI=1S/3ClH.W/h3*1H;/q;;;+3/p-3
    Key: KBSJJSOGQSGFRD-UHFFFAOYSA-K
  • Cl[W](Cl)Cl
Properties
Cl18W6
Molar mass 1741.14 g·mol−1
Appearance yellow brown solid
Density 5.44 g·cm−3
Melting point 550 °C (1,022 °F; 823 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Tungsten(III) chloride is the inorganic compound with the formula W6Cl18. It is a cluster compound. It is a brown solid, obtainable by chlorination of tungsten(II) chloride. Featuring twelve doubly bridging chloride ligands, the cluster adopts a structure related to the corresponding chlorides of niobium and tantalum. In contrast, W6Cl12 features eight triply bridging chlorides.

A related mixed valence W(III)-W(IV) chloride is prepared by reduction of the hexachloride with bismuth:

9 WCl6 + 8 Bi → 3 W3Cl10 + 8 BiCl3
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