Tungsten(VI) oxytetrabromide

Brown black solid

Fixed

5.5 g · cm -3

277 ° C.

327 ° C.

Reacts with water

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Tungsten ( VI) is an inorganic chemical compound oxidtetrabromid of tungsten from the group of Oxidbromide.

Production and representation

Tungsten ( VI) can be obtained oxidtetrabromid (VI ) bromide with the reaction of tungsten ( VI) oxide with tungsten and bromine, or tungsten.

Also possible is the extraction by heating tungsten ( VI) oxide with carbon tetrabromide at 440 ° C or with boron ( III ) bromide at 130 ° C, and the reaction of tungsten ( III ) bromide with liquid sulfur dioxide.

It is also formed by the decomposition of tungsten (VI) dioxiddibromid WO2Br2 at 200 ° C.

Properties

Tungsten ( VI) oxidtetrabromid is a black-brown, crystalline, highly moisture-sensitive solid which immediately decomposes into water. It is soluble in concentrated hydrochloric acid, 1,4-dioxane, and acetone. It has a tetragonal crystal structure isotypic with tungsten ( VI) oxidtetrachlorid (a = 896 pm, c = 393 pm ).