Tellurium tetrabromide

General
Surname	Tellurium tetrabromide
other names	Tellurium (IV) bromide
Molecular formula	TeBr 4
Brief description	yellow to orange solid
External identifiers / databases
EC number	233-090-7
ECHA InfoCard	100.030.070
PubChem	82311
Wikidata	Q2680313
properties
Molar mass	447.27 g mol −1
Physical state	firmly
density	4.31 g cm −3
Melting point	380 ° C
boiling point	420 ° C (decomposition)
safety instructions
H and P phrases	H: 300-314-318
	P: 260-301 + 310-303 + 361 + 353-305 + 351 + 338-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tellurium tetrabromide is an inorganic chemical compound of tellurium from the group of bromides .

Extraction and presentation

Tellurium tetrabromide can be obtained by reacting tellurium with bromine .

{\ displaystyle \ mathrm {Te + 2 \ Br_ {2} \ longrightarrow TeBr_ {4}}}

It is also possible to display it by reacting tellurium tetrachloride or tellurium dioxide (at 110 ° C.) with boron tribromide

{\ displaystyle \ mathrm {3 \ TeCl_ {4} +4 \ BBr_ {3} \ longrightarrow 3 \ TeBr_ {4} +4 \ BCl_ {3}}}

{\ displaystyle \ mathrm {3 \ TeO_ {2} +4 \ BBr_ {3} \ longrightarrow 3 \ TeBr_ {4} +2 \ B_ {2} O_ {3}}}

or iodobromide with tellurium.

{\ displaystyle \ mathrm {4 \ IBr + Te \ longrightarrow TeBr_ {4} +2 \ I_ {2}}}

properties

Tellurium tetrabromide is a moisture-sensitive, hygroscopic, yellow to orange-colored, crystalline solid that decomposes on contact with water. It is soluble in ether and glacial acetic acid . In hydrobromic acid it is dissolved to form the hexbromidotelluric acid H ₂ [TeBr ₆ ], from which alkali salts such. B. the orange-red cesium hexabromidotellurate (IV) Cs ₂ [TeBr ₆ ] can be easily isolated. When heated, partial decomposition takes place with the release of bromine, which is why the compound cannot be melted or distilled without decomposition at normal pressure. In the solid state tellurium tetrabromide has a structure of Kuban type which as of four linked via halide bridges TeBr ₃⁺ Br ^- can be described assembled units.

Individual evidence

↑ ^a ^b ^c Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 435.
↑ ^a ^b ^c ^d ^e ^f data sheet Tellurium (IV) bromide, ultra dry, 99.999% (metals basis) from AlfaAesar, accessed on December 15, 2013 ( PDF )(JavaScript required) .
↑ ^a ^b J. J. Zuckerman: Inorganic Reactions and Methods, The Formation of Bonds to Halogens . John Wiley & Sons, 2009, ISBN 0-470-14538-2 , pp. 68,100,191 ( limited preview in Google Book Search).
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 632.

[brauer-1] Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 435.

[Alfa-2] ↑ ^a ^b ^c ^d ^e ^f data sheet Tellurium (IV) bromide, ultra dry, 99.999% (metals basis) from AlfaAesar, accessed on December 15, 2013 ( PDF )(JavaScript required) .

[J._J._Zuckerman-3] J. J. Zuckerman: Inorganic Reactions and Methods, The Formation of Bonds to Halogens . John Wiley & Sons, 2009, ISBN 0-470-14538-2 , pp. 68,100,191 ( limited preview in Google Book Search).

[Arnold_F._Holleman,_Egon_Wiberg,_Nils_Wiberg-4] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 632.