Tungsten(VI) oxytetrachloride

Tungsten(VI) oxytetrachloride is the inorganic compound with the formula WOCl₄. This diamagnetic solid is used to prepare other complexes of tungsten. The orange-coloured compound is soluble in nonpolar solvents but it reacts with alcohols and water and forms adducts with Lewis bases. The solid consists of weakly associated square pyramidal monomers. The compound is classified as an oxyhalide.

WOCl₄ is prepared from tungsten trioxide:

WO₃ + 2 SOCl₂ → WOCl₄ + 2 SO₂WCl₆ + (Me₃Si)₂O → WOCl₄ + 2 Me₃SiCl