Tungsten(VI) oxytetrachloride

• Tungsten ( VI) chloridoxid
• Tungsten ( VI) oxide chlorides

Red solid

Fixed

11.92 g · cm -3

211 ° C

227.5 ° C

• Reacts with water
• Soluble in carbon disulfide

Attention

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Tungsten ( VI) is an inorganic chemical compound oxidtetrachlorid of tungsten from the group of the oxychlorides.

Production and representation

Tungsten ( VI) can oxidtetrachlorid by reaction of tungsten ( VI) oxide, tungsten (VI ) chloride and sodium tungstate with thionyl chloride are obtained.

Also possible is the preparation by heating by tungsten ( VI) oxide with a solution of chlorine in carbon tetrachloride at 200 ° C or by the reaction of tungsten powder with sulfuryl chloride at 300 ° C.

It is also formed during the thermal decomposition of tungsten ( VI) dioxiddichlorid.

Properties

Tungsten ( VI) is in the form of oxidtetrachlorid long, glossy, red needles, which appear yellow in transmitted light. It is decomposed by water immediately, by the humidity slowly with formation of tungstic acid. It has a tetragonal crystal structure with space group I4 (a = 848 pm, c = 399 pm ). In addition to the red tungsten ( VI) oxidtetrachlorid WOCl4 exist with the yellow tungsten ( VI) dioxiddichlorid WO2Cl2, the olive tungsten ( V) oxidtrichlorid WOCl3 and the golden-brown tungsten ( IV) oxide chlorides oxiddichlorid WOCl2 more of tungsten.

Use

Tungsten ( VI) is used in oxidtetrachlorid incandescent lamps and as a catalyst for the production of olefins.