Tungsten hexachloride

Tungsten hexachloride

Black - purple solid with a pungent odor

Fixed

3.52 g · cm -3

275 ° C.

346 ° C

Decomposes in water

Risk

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Tungsten (VI ) chloride is a chemical compound selected from the group of chlorides and tungsten compounds. It is an important compound in the preparation of other tungsten compounds.

Production and representation

Tungsten (VI ) chloride can be obtained by chlorination of tungsten.

It can also be obtained by reaction of tungsten ( VI) oxide with carbon tetrachloride in the absence of water (otherwise red Wolframoxidchlorid WOCl4 forms ).

Properties

Tungsten ( VI ) chloride is a blue-black, moisture- sensitive solid. In a desiccator over sulfuric acid, protected from light, it is indefinitely stable. It is very slightly soluble in alcohol (with yellow color), carbon tetrachloride (with red or dark brown color ), carbon disulfide, ether, benzene, ligroin, acetone. These solutions decompose on standing in air and very quickly when heated or when water is added.

Tungsten ( VI ) chloride is corrosive and corrosive. He is a little soluble in water, but hydrolysis occurs under hydrogen chloride release a. This runs slower, the purer it is. The compound is available in two crystal structures before said α - tungsten (VI ) chloride at 226 ° C is stable and has a rhombohedral structure.