Tungsten(II) chloride

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| ImageFile = Mo6Cl12-xtal-1993-CM-3D-balls.png

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|Section1={{Chembox Identifiers

| CASNo = 12052-19-6

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| ChemSpiderID = 122844

| PubChem = 101282746

| StdInChI=1S/2ClH.W/h2*1H;/q;;+2/p-2

| StdInChIKey = UDJQAOMQLIIJIE-UHFFFAOYSA-L

| SMILES = [Cl-].[Cl-].[W+2]

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|Section2={{Chembox Properties

| Cl=12|W=6

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| Appearance = yellow brown solid

| Density = 5.44 g·cm⁻³

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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.{{cite book|author1=Nolting, D. D. |author2=Messerle, L. |chapter=Octahedral Hexatungsten Halide Clusters |title=Inorganic Syntheses: Volume 36|journal=Inorg. Synth.|year=2014|volume=36|pages=19–23|doi=10.1002/9781118744994.ch4|isbn=9781118744994}} The structural chemistry resembles that observed for molybdenum(II) chloride.

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

:6 WCl₆ + 8 Bi → W₆Cl₁₂ + 8 BiCl₃

:Image:Mo6Cl14-anion-from-xtal-2008-CM-3D-ellipsoids.png.