Iridium (VI) fluoride

Structural formula
General
Surname	Iridium (VI) fluoride
other names	Iridium hexafluoride
Molecular formula	IrF 6
Brief description	yellow crystalline solid
External identifiers / databases
EC number	232-024-4
ECHA InfoCard	100.029.113
PubChem	3014587
Wikidata	Q420934
properties
Molar mass	306.22 g mol −1
Physical state	firmly
density	5.11 g cm −3 (−140 ° C)
Melting point	44 ° C
boiling point	53.6 ° C
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 (VI) fluoride (IrF ₆ ), often also iridium hexafluoride , is a chemical compound of the elements iridium and fluorine and belongs to the group of hexafluorides .

presentation

Iridium hexafluoride is produced by direct conversion of the metal in an excess of elemental fluorine (F ₂ ) at 300 ° C.

{\ displaystyle {\ ce {Ir + 3 F2 -> IrF6}}}

properties

Iridium hexafluoride is a yellow crystalline solid that melts at 44 ° C and boils at 53.6 ° C. It is in the form of pale yellow, shiny leaves and needles, which become intensely golden yellow and glassy above −15 ° C. It is very hygroscopic, attacks glass. Platinum is corroded from 400 ° C. Halogens reduce it to iridium (IV) fluoride at room temperature . It crystallizes in the orthorhombic crystal system (measured at −140 ° C) in the space group Pnma (No. 62) with the lattice parameters a = 941.1 pm , b = 854.7 pm and c = 495.2 pm and four formula units per unit cell with a calculated density of 5.11 g cm ⁻³ . The IrF ₆ molecule is octahedral ( O _h ); the Ir-F bond length is 183.3 pm. Template: room group / 62

Individual evidence

↑ ^a ^b ^c ^d David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-68.
↑ ^a ^b ^c ^d T. Drews, J. Supeł, A. Hagenbach, K. Seppelt: "Solid State Molecular Structures of Transition Metal Hexafluorides", in: Inorganic Chemistry , 2006 , 45 (9), pp. 3782-3788; doi : 10.1021 / ic052029f ; PMID 16634614 .
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ 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. 282.

literature

Gmelins Handbuch der Inorganic Chemistry , System No. 67, Iridium, Supplementary Volume 2, pp. 99-102.

[CRC_HANDBOOK_IrF6-1] David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-68.

[D_BLOCK_XF6-2] T. Drews, J. Supeł, A. Hagenbach, K. Seppelt: "Solid State Molecular Structures of Transition Metal Hexafluorides", in: Inorganic Chemistry , 2006 , 45 (9), pp. 3782-3788; doi : 10.1021 / ic052029f ; PMID 16634614 .

[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.

[brauer-4] 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. 282.