Indium (III) bromide

Crystal structure
	__ In 3+ __ Br -
General
Surname	Indium (III) bromide
other names	Indium tribromide
Ratio formula	InBr 3
Brief description	white solid
External identifiers / databases
EC number	236-692-8
ECHA InfoCard	100.033.343
PubChem	26046
Wikidata	Q4096881
properties
Molar mass	354.53 g mol −1
Physical state	firmly
density	4.96 g cm −3 (25 ° C)
Melting point	436 ° C
boiling point	656 ° C
solubility	soluble in water (846 g l −1 at 22 ° C); soluble in ethanol (740 g l −1 at 22 ° C);
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 315-319-335
	P: 261-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Indium (III) bromide is an inorganic chemical compound of indium from the group of bromides .

Extraction and presentation

Indium (III) bromide can be obtained by reacting indium with bromine vapor .

{\ displaystyle \ mathrm {2 \ In + 3 \ Br_ {2} \ longrightarrow 2 \ InBr_ {3}}}

Aqueous solutions of indium (III) bromide can easily be obtained from indium and hydrobromic acid . When concentrated above 33 ° C, anhydrous indium (III) bromide separates from these. Below 33 ° C, hydrates exist as soil bodies.

properties

Indium (III) bromide is a light gray solid that is soluble in water and ethanol . It begins to sublime at 371 ° C. The compound crystallizes monoclinically , space group C 2 / m (space group no. 12) with the lattice parameters a = 6.646 Å , b = 11.64 Å, c = 6.633 Å and β = 109.0 °. It consists of layers of InBr ₆ - octahedra which are joined at three edges. Template: room group / 12

use

Indium (III) bromide is a versatile water-tolerant Lewis acid - catalyst . Examples of use include the dithioacetalization of aldehydes in non-aqueous and aqueous media, the addition of trimethylsilyl cyanide to ɑ-hetero-substituted ketones , the conversion of oxiranes to thiiranes with potassium thiocyanate and the addition of indoles to enones and to chiral epoxides .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 867.
↑ ^a ^b ^c ^d ^e ^f ^g data sheet Indium (III) bromide, 99.999% trace metals basis from Sigma-Aldrich , accessed on March 17, 2014 ( PDF ).
↑ T. Staffel, G. Meyer: In ₅ Br ₇ , the second mixed-valence In (I) -In (II) bromide: In (I) ₃ (In (II) ₂ Br ₆ ) Br. In: Journal for inorganic and general chemistry , 563, 1988, pp. 27-37, doi: 10.1002 / zaac.19885630105 .
^ William W. Porterfield: Inorganic Chemistry . Academic Press, 2013, ISBN 0-323-13894-2 , pp. 132 ( limited preview in Google Book search).
↑ Tetrahedron Lett., 41 , 9695 (2000).
↑ Tetrahedron Lett., 42 , 3041 (2001).
^ Synlett, 396 (2003)
↑ J. Org. Chem., 67 , 3700 (2002); 68 , 7126 (2003)
↑ J. Org. Chem., 67 , 5386 (2002).

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 867.

[Sigma-2] ↑ ^a ^b ^c ^d ^e ^f ^g data sheet Indium (III) bromide, 99.999% trace metals basis from Sigma-Aldrich , accessed on March 17, 2014 ( PDF ).

[3] T. Staffel, G. Meyer: In ₅ Br ₇ , the second mixed-valence In (I) -In (II) bromide: In (I) ₃ (In (II) ₂ Br ₆ ) Br. In: Journal for inorganic and general chemistry , 563, 1988, pp. 27-37, doi: 10.1002 / zaac.19885630105 .

[William_W._Porterfield-4] William W. Porterfield: Inorganic Chemistry . Academic Press, 2013, ISBN 0-323-13894-2 , pp. 132 ( limited preview in Google Book search).

[5] Tetrahedron Lett., 41 , 9695 (2000).

[6] Tetrahedron Lett., 42 , 3041 (2001).

[7] Synlett, 396 (2003)

[8] J. Org. Chem., 67 , 3700 (2002); 68 , 7126 (2003)

[9] J. Org. Chem., 67 , 5386 (2002).