Tungsten(II) chloride

Tungsten(II) chloride is the inorganic compound with the formula W₆Cl₁₂. It is a polymeric cluster compound. The material dissolves in concentrated hydrochloric acid, forming (H₃O)₂[W₆Cl₁₄](H₂O)_x. Heating this salt gives yellow-brown W₆Cl₁₂.^[1] The structural chemistry resembles that observed for molybdenum(II) chloride.

Tungsten(II) chloride

Identifiers
CAS Number	12052-19-6 Y
3D model (JSmol)	Interactive image
ChemSpider	122844
PubChem CID	101282746
InChI InChI=1S/2ClH.W/h2*1H;/q;;+2/p-2 Key: UDJQAOMQLIIJIE-UHFFFAOYSA-L
SMILES [Cl-].[Cl-].[W+2]
Properties
Chemical formula	Cl12W6
Molar mass	1528.44 g·mol−1
Appearance	yellow brown solid
Density	5.44 g·cm−3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tungsten(II) chloride is prepared by reduction of the hexachloride. Bismuth is a typical reductant:

6 WCl₆ + 8 Bi → W₆Cl₁₂ + 8 BiCl₃

Structure of the cluster anion [W₆Cl₁₄]²⁻

.