Tantalum(V) bromide

Tantalpentabromid

Moisture-sensitive yellow solid with a characteristic odor

Fixed

4,989 g · cm -3

265 ° C.

348.8 ° C

Reacts with water

Risk

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Tantalum (V ) bromide is an inorganic chemical compound from the group of tantalum bromides.

Production and representation

Tantalum (V) bromide, can be obtained by reaction of tantalum with bromine at 230-250 ° C.

Alternatively, it can be obtained with carbon tetrabromide or aluminum (III ) bromide by reaction of tantalum ( V) oxide.

Properties

Tantalum (V ) bromide is a very moisture sensitive, fuming in air, a yellow solid with a characteristic odor. It has a monoclinic crystal structure isotypic to that of α - niobium (V ) chloride with the space group C2 / m and 6 formula units in the unit cell (a = 1943.3 pm, b = 1877.5 pm, c = 620.3 pm, β = 90.72 °). The structure of tantalum (V ) bromide was first described in 1958 by RF Rolsten, however determined an orthorhombic crystal structure with space group PBMA. Is (V), tantalum iodide constructed of dimeric molecules.

Use

Tantalum (V ) bromide may be used as a catalyst in organic synthesis.