Tungsten (VI) bromide

Crystal structure
	__ W 6+ __ Br -
Crystal system	trigonal
Space group	R 3 (No. 148)
Lattice parameters	a = 639.4 pm ; c = 1753 pm
General
Surname	Tungsten (VI) bromide
other names	Tungsten hexabromide
Ratio formula	WBr 6
Brief description	dark gray solid
External identifiers / databases
Wikidata	Q4096867
properties
Molar mass	663.26 g mol −1
Physical state	firmly
density	6.9 g cm −3
Melting point	232 ° C
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tungsten (VI) bromide is an inorganic chemical compound of tungsten from the group of bromides .

Extraction and presentation

Tungsten (VI) bromide can be obtained by reacting tungsten (V) bromide with bromine at room temperature in the absence of oxygen and in a protective atmosphere.

{\ displaystyle {\ ce {2WBr5 + Br2 -> 2WBr6}}}

It is also possible to show this by reacting tungsten hexacarbonyl with bromine or by reacting tungsten (VI) chloride with boron (III) bromide .

{\ displaystyle {\ ce {W (CO) 6 + 3Br2 -> WBr6 + 6CO}}}

properties

Tungsten (VI) bromide is an extremely hydrolysis-sensitive, dark-gray powder or pale-gray solid with a metallic sheen. At room temperature it reacts slowly with dry oxygen, releasing bromine. Above 200 ° C, it decomposes rapidly into tungsten (V) bromide and bromine. The crystal structure ( trigonal , space group R 3 . (Space group No. 148) ) consists of isolated WBr ₆ - octahedra . Template: room group / 148

Individual evidence

^ ^A ^b W. Willing, U. Müller: Wolframhexabromid . In: Acta Crystallographica , 1987 , C43 , pp. 1425-1426 ( doi : 10.1107 / S0108270187091625 ).
↑ ^a ^b ^c ^d ^e Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1561.
^ ^A ^b Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 441 ( limited preview in Google Book search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Willing-1] A ^b W. Willing, U. Müller: Wolframhexabromid . In: Acta Crystallographica , 1987 , C43 , pp. 1425-1426 ( doi : 10.1107 / S0108270187091625 ).

[brauer-2] Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1561.

[Dale_L._Perry-3] A ^b Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis US, 2011, ISBN 1-4398-1462-7 , pp. 441 ( limited preview in Google Book search).

[NV-4] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.