Tungsten(II) chloride is the inorganic compound with the formula W<sub>6</sub>Cl<sub>12</sub>. It is a polymeric cluster compound. The material dissolves in concentrated hydrochloric acid, forming (H<sub>3</sub>O)<sub>2</sub>[W<sub>6</sub>Cl<sub>14</sub>](H<sub>2</sub>O)<sub>x</sub>. Heating this salt gives yellow-brown W<sub>6</sub>Cl<sub>12</sub>. 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: