Indium (I, III) bromide

Crystal structure
__ In +      __ In 3+      __ Br -
Space group	Pnna (No. 52)
General
Surname	Indium (I, III) bromide
other names	Indium dibromide Indium (II) bromide
Ratio formula	InBr 2
Brief description	light yellow solid
External identifiers / databases
CAS number 21264-43-7 PubChem 6370321 ChemSpider 4898803 Wikidata Q4096876
properties
Molar mass	274.63 g mol −1
Physical state	firmly
density	4.2 g cm −3
Melting point	197.1 ° C
boiling point	630 ° C (decomposition)
solubility	reacts with water
safety instructions
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 .

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

Extraction and presentation

Indium (I, III) bromide can be obtained by reacting indium with bromine at 300 to 400 ° C or with indium (III) bromide at 350 ° C.

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

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

It also occurs in the waste from the production of semiconductors.

properties

Indium (I, III) bromide is a light yellow diamagnetic solid. It can be separated into indium (I) bromide and indium (III) bromide (ether-soluble) by ether extraction . Indium (I, III) bromide (In [InBr ₄ ]) is a mixed-valence indium I – III bromide of the gallium (I, III) chloride type with an orthorhombic crystal structure and crystallizes in the space group Pnna (space group no. 52) with the lattice parameters a = 798.6 pm, b = 1038.5 pm, c = 1042.5 pm and eight formula units per unit cell .

Individual evidence

1. ↑ ^{a b c d e} 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. 868.
2. ↑ WebElements: WebElements Periodic Table of the Elements | Indium | indium dibromide , accessed Tuesday, March 18, 2014
3. ↑ ^{a b} ya. M. Grushko: Handbook of Dangerous Properties of Inorganic And Organic Substances in ... CRC Press, 1992, ISBN 0-8493-9300-0 , p. 52 ( limited preview in Google Book search).
4. ^ William M. Haynes: CRC Handbook of Chemistry and Physics, 93rd Edition . CRC Press, 2012, ISBN 1-4398-8049-2 , pp. 4–67 ( limited preview in Google Book Search).
5. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
6. ↑ Thomas Staffel, Gerd Meyer: The mono-, sesqui-, and dibromides of indium: InBr, In2Br3, and InBr2. In: Journal of Inorganic and General Chemistry. 552, 1987, pp. 113-122, doi : 10.1002 / zaac.19875520913 .