Germanium (IV) bromide

Crystal structure
	__ Ge 4+ __ Br -
Crystal system	cubic
Space group	Pa 3 (No. 205)
Lattice parameters	a = 11.17 Å
General
Surname	Germanium (IV) bromide
other names	Germanium tetrabromide; Tetrabromgerman;
Ratio formula	GeBr 4
Brief description	white solid with a sour odor
External identifiers / databases
EC number	236-612-1
ECHA InfoCard	100.033.270
PubChem	26011
Wikidata	Q4096871
properties
Molar mass	392.26 g mol −1
Physical state	firmly
density	3.13 g cm −3 (25 ° C)
Melting point	26.1 ° C
boiling point	186.5 ° C
solubility	violent reaction with water; soluble in alcohol, carbon tetrachloride, benzene and ether;
Refractive index	1.6269 (26 ° C)
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 314
	P: 280-305 + 351 + 338-310
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Germanium (IV) bromide is an inorganic chemical compound of germanium from the group of bromides .

Extraction and presentation

Germanium (IV) bromide can be obtained by reacting germanium with bromine at 200 ° C.

{\ displaystyle {\ ce {Ge + 2Br2 -> GeBr4}}}

It is also possible to obtain it by reacting germanium (IV) oxide with hydrobromic acid at 180 ° C.

{\ displaystyle {\ ce {GeO2 + 4HBr -> GeBr4 + 2H2O}}}

properties

Germanium (IV) bromide is a white solid with a sour smell that reacts violently with water. It is soluble in pure ethanol , carbon tetrachloride , benzene and ether. Germanium (IV) bromide crystallizes in the cubic crystal system , space group Pa 3 (space group no. 205) with the lattice parameter a = 11.17 Å . The crystal structure consists of tetrahedral GeBr ₄ molecules. Template: room group / 205

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Germanium (IV) bromide data sheet from Sigma-Aldrich , accessed on May 16, 2017 ( PDF ).

↑ ^a ^b ^c Germanium (IV) bromide data sheet from AlfaAesar, accessed on January 18, 2014 ( PDF )(JavaScript required) .

↑ ^a ^b ^c ^d 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. 723.

↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Index of Refraction of Inorganic Liquids, pp. 4-140.

^ J. Köhler, H. Okudera, D. Reuter, A. Simon: Crystal structure of germanium tetrabromide, a-GeBr4, room temperature modification. In: Z. Kristallogr. - NCS , 220, 2005, p. 523, doi: 10.1524 / ncrs.2005.220.4.523 .

[Sigma-1] ↑ ^a ^b ^c ^d ^e ^f ^g Germanium (IV) bromide data sheet from Sigma-Aldrich , accessed on May 16, 2017 ( PDF ).

[Alfa-2] Germanium (IV) bromide data sheet from AlfaAesar, accessed on January 18, 2014 ( PDF )(JavaScript required) .

[brauer-3] 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. 723.

[CRC90_4_140-4] David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Index of Refraction of Inorganic Liquids, pp. 4-140.

[5] J. Köhler, H. Okudera, D. Reuter, A. Simon: Crystal structure of germanium tetrabromide, a-GeBr4, room temperature modification. In: Z. Kristallogr. - NCS , 220, 2005, p. 523, doi: 10.1524 / ncrs.2005.220.4.523 .