How to Prepare Tungsten Oxychloride?

WOCl4 can be obtained from the chlorination of tungsten trioxide or the reaction of tungsten hexachloride:

WO3 + 2 SOCl2 → WOCl4 + 2 SO2

WCl6 + (Me3Si)2O → WOCl4 + 2 Me3SiCl

WO3 + 2 WCl6 → 3 WOCl4

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