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Tungsten(II) chloride
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<p>Tungsten(II) chloride is the <a href="/facts/Inorganic_compound/TfFfzxSz">inorganic compound</a> with the formula W6Cl12. It is a <a href="/facts/Polymer/eF32E50K">polymeric</a> <a href="/facts/Octahedral_cluster/GC5LrhvI">cluster compound</a>. The material dissolves in concentrated <a href="/facts/Hydrochloric_acid/HqItJlUT">hydrochloric acid</a>, forming (H3O)2[W6Cl14](H2O)x. Heating this salt gives yellow-brown W6Cl12. The structural chemistry resembles that observed for <a href="/facts/Molybdenum(II)_chloride/xhc2bqP5">molybdenum(II) chloride</a>. </p><p>Tungsten(II) chloride is prepared by reduction of the hexachloride. Bismuth is a typical reductant: </p> 6 WCl6 + 8 Bi → W6Cl12 + 8 BiCl3 .