Iridium (III) bromide

Crystal structure
	__ Ir 3+ __ Br -
General
Surname	Iridium (III) bromide
other names	Iridium tribromide
Ratio formula	IrBr 3
Brief description	dark red-brown solid
External identifiers / databases
ECHA InfoCard	100.030.146
PubChem	82324
Wikidata	Q4096877
properties
Molar mass	449.94 g mol −1
Physical state	firmly
density	6.82 g cm −3
solubility	very sparingly soluble in water, acids and alkalis
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 .

Iridium (III) bromide is an inorganic chemical compound of iridium from the group of bromides . In addition to this, an iridium (I) bromide, iridium (II) bromide and basic iridium (III) bromide hydrates (Ir (OH) Br ₃ · 3H ₂ O) are also known.

Extraction and presentation

Iridium (III) bromide can be obtained by reacting iridium (II) bromide with bromine . The tetrahydrate can be obtained by reacting iridium (IV) oxide dihydrate with a hydrogen bromide solution . It can also be represented from the elements at 8 atm and 570 ° C.

properties

Iridium (III) bromide is a dark red-brown solid that is very sparingly soluble in water, acids and alkalis and decomposes into iridium (II) bromide when heated. It crystallizes in a strongly disordered layer structure of the aluminum (III) chloride or. Chromium (III) chloride type, whereby the monoclinic unit cell contains four formula units. As with rhenium (III) chloride , rhenium (III) bromide , α- iridium (III) chloride and α- ruthenium (III) chloride , the disorder is due to the different stacking of the metal layers. The light olive green tetrahydrate is easily soluble in water, but insoluble in ethanol and ether. When heated to 100 ° C, it turns dark brown when water is released and decomposes to iridium and bromine at higher temperatures.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f H. J. Kandiner: Iridium . Springer-Verlag, 2013, ISBN 978-3-662-12128-3 ( limited preview in Google book search).
^ Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 213 ( 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.
^ Stanley E. Livingstone: The Chemistry of Ruthenium, Rhodium, Palladium, Osmium, Iridium and Platinum Pergamon Texts in Inorganic Chemistry . Elsevier, 2017, ISBN 978-1-4831-5840-2 , pp. 1257 ( limited preview in Google Book Search).
^ K. Brodersen, G. Thiele, H. Ohnsorge, I. Recke, F. Moers: The structure of IrBr ₃ and about the causes of the disorder phenomena in the noble metal trihalides crystallizing in layer structures. In: Journal of the Less Common Metals. 15, 1968, p. 347, doi : 10.1016 / 0022-5088 (68) 90194-X .

[H._J._Kandiner-1] ↑ ^a ^b ^c ^d ^e ^f H. J. Kandiner: Iridium . Springer-Verlag, 2013, ISBN 978-3-662-12128-3 ( limited preview in Google book search).

[Dale_L._Perry-2] Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 213 ( limited preview in Google Book search).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Stanley_E._Livingstone-4] Stanley E. Livingstone: The Chemistry of Ruthenium, Rhodium, Palladium, Osmium, Iridium and Platinum Pergamon Texts in Inorganic Chemistry . Elsevier, 2017, ISBN 978-1-4831-5840-2 , pp. 1257 ( limited preview in Google Book Search).

[DOI10.1016/0022-5088(68)90194-X-5] K. Brodersen, G. Thiele, H. Ohnsorge, I. Recke, F. Moers: The structure of IrBr ₃ and about the causes of the disorder phenomena in the noble metal trihalides crystallizing in layer structures. In: Journal of the Less Common Metals. 15, 1968, p. 347, doi : 10.1016 / 0022-5088 (68) 90194-X .