What is tungsten hexachloride? Tungsten hexachloride is the chemical compound of tungsten and chlorine with the formula of WCl6. It shows dark blue or blue violet appearance, and exists as a volatile fine powder under standard conditions.
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Tungsten hexachloride is a blue-black solid at room temperature. At lower temperatures, it becomes wine-red in color. A red form of the compound can be made by rapidly condensing its vapor, which reverts to the blue-black form on gentle heating. It is readily hydrolyzed, even by moist air, giving the orange oxychlorides WOCl4 and WO2Cl2, and subsequently, tungsten trioxide. WCl6 is soluble in carbon disulfide, carbon tetrachloride, and phosphorus oxychloride.
Tungsten hexachloride can be prepared by chlorinating tungsten metal in a sealed tube at 600 °C: W + 3Cl2 → WCl6
What should be noted is that WCl6 is an aggressively corrosive oxidant, and hydrolyzes to release hydrogen chloride.
