Iridium hexafluoride

Names
IUPAC name

iridium(VI) fluoride

Other names

iridium hexafluoride

Identifiers

CAS Number

* 7783-75-7 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 10323846

PubChem CID

* 3014587

UNII |

* UP14U33TGX Y

InChI

* InChI=1S/6FH.Ir/h6*1H;/q;;;;;;+6/p-6

Key: JQAZQSHUPWSSPF-UHFFFAOYSA-H

* InChI=1/6FH.Ir/h6*1H;/q;;;;;;+6/p-6/rF6Ir/c1-7(2,3,4,5)6

Key: JQAZQSHUPWSSPF-VYYYRSGCAJ

SMILES

* F[Ir](F)(F)(F)(F)F

Properties

Chemical formula

| IrF6
Molar mass | 306.22 g/mol
Appearance  | yellow crystalline solid[1]
Density | 5.11g/mL[2]
Melting point |  44 °C (111 °F; 317 K)[1]
Boiling point |  53.6 °C (128.5 °F; 326.8 K)[1]
Solubility | soluble in HF
Related compounds

Other cations

| rhodium hexafluoride
osmium hexafluoride
platinum hexafluoride

Related compounds

| iridium(V) fluoride

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

N verify (what is YN ?)
Infobox references

Iridium hexafluoride, also iridium(VI) fluoride, (IrF6) is a compound of iridium and fluorine and one of the seventeen known binary hexafluorides. It is one of only a few compounds with iridium in the oxidation state +6.

## Contents

* 1 Synthesis
* 2 Description
* 3 References
* 4 Further reading
* 5 External links

## Synthesis

Iridium hexafluoride is made by a direct reaction of iridium metal in an excess of elemental fluorine gas at 300 °C. However, it is thermally unstable and must be frozen out of the gaseous reaction mixture to avoid dissociation.

Ir \+ 3 F2 → IrF6

## Description

Iridium hexafluoride is a yellow crystalline solid that melts at 44 °C and boils at 53.6 °C.[1] The solid structure measured at −140 °C is orthorhombic space group Pnma. Lattice parameters are a = 9.411 Å, b = 8.547 Å, and c = 4.952 Å. There are four formula units (in this case, discrete molecules) per unit cell, giving a density of 5.11 g·cm−3.[2]

The IrF6 molecule itself (the form important for the liquid or gas phase) has octahedral molecular geometry, which has point group (Oh). The Ir–F bond length is 1.833 Å.[2]

Calculations suggest that fluorine might react with iridium hexafluoride at 39 GPa to form IrF8.[3]

It is able to oxidize elemental chlorine to the salt Cl2IrF6, analogous to O2PtF6.[4]

## References

1. ↑ 1.0 1.1 1.2 1.3 CRC Handbook of Chemistry and Physics, 90th Edition, CRC Press, Boca Raton, Florida, 2009, ISBN 978-1-4200-9084-0, Section 4, Physical Constants of Inorganic Compounds, p. 4-85.
2. ↑ 2.0 2.1 2.2 Drews, T.; Supeł, J.; Hagenbach, A.; Seppelt, K. (May 2006). "Solid State Molecular Structures of Transition Metal Hexafluorides". Inorganic Chemistry 45 (9): 3782–8. doi:10.1021/ic052029f. PMID 16634614.
3. ↑ Lin, Jianyan; Zhao, Ziyuan; Liu, Chunyu; Zhang, Jing; Du, Xin; Yang, Guochun; Ma, Yanming (2019-03-13). "IrF8 Molecular Crystal under High Pressure". Journal of the American Chemical Society (American Chemical Society (ACS)) 141 (13): 5409–5414. doi:10.1021/jacs.9b00069. ISSN 0002-7863. PMID 30864432.
4. ↑ Graham, Lionell (1978-10-01). The Oxidizing Power of Some Platinum Metal Fluorides (PDF) (PhD thesis). Lawrence Berkeley National Laboratory. p. 55\. Archived from the original (PDF) on 2024-09-16. Retrieved 2026-01-21.

## Further reading

* Gmelins Handbuch der anorganischen Chemie, System Nr. 67, Iridium, Supplement Volume 2, pp. 99–102.

## External links

* Iridium hexafluoride at webelements.com.

* v
* t
* e

Binary hexafluorides

Known binary hexafluorides|

| Chalcogen binary hexafluorides|

* SF6
* SeF6
* TeF6
* PoF6

|

Noble gas binary hexafluorides|

* XeF6

Transition metal binary hexafluorides|

* MoF6
* TcF6
* RuF6
* RhF6
* WF6
* ReF6
* OsF6
* IrF6
* PtF6

Actinide binary hexafluorides|

* UF6
* NpF6
* PuF6

Predicted binary hexafluorides|

| Noble gas binary hexafluorides|

* KrF6
* RnF6

|

Transition metal binary hexafluorides|

* CrF6
* PdF6

Actinide binary hexafluorides|

* AmF6

* v
* t
* e

Iridium compounds

Iridium(0)|

| Organoiridium(0)|

* Ir4(CO)12

|

Iridium(I)|

| Organoiridium(I)|

* IrC8H12C5H5NP(C6H11)3PF6
* IrClCO(P(C6H5)3)2
* KIrI2(CO)2

|

Iridium(III)|

* IrCl3

| Organoiridium(III)|

* (IrClC5(CH3)5)2Cl2

|

Iridium(IV)|

* IrF4
* IrO2
* (NH4)2[IrCl6]

Iridium(V)|

* IrF5

Iridium(VI)|

* IrF6

Iridium(VII)|

* IrF7

Iridium(VIII)|

* IrO4

* v
* t
* e

Fluorine compounds

| HF |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | He

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LiF | BeF2 |  |  |  |  |  |  |  |  |  |  | BF3
B2F4 | CF4 | NF3 | OF2 | F− | Ne
NaF | MgF2 |  |  |  |  |  |  |  |  |  |  | AlF3 | SiF4 | PF3
PF5 | SF2
SF4
SF6 | ClF
ClF3
ClF5 | Ar
KF | CaF2 | ScF3 | TiF3
TiF4 | VF3
VF4
VF5 | CrF2
CrF3
CrF4
CrF5 | MnF2
MnF3 | FeF2
FeF3 | CoF2
CoF3 | NiF2 | CuF
CuF2 | ZnF2 | GaF3 | GeF4 | AsF3
AsF5 | SeF4
SeF6 | BrF3
BrF5 | KrF2
RbF | SrF2 | YF3 | ZrF4 | NbF4
NbF5 | MoF5
MoF6 | TcF6 | RuF3
RuF4
RuF5
RuF6 | RhF6 | PdF2 | AgF
AgF2
Ag2F | CdF2 | InF3 | SnF2
SnF4 | SbF3
SbF5 | TeF4 | IF
IF3
IF5
IF7 | XeF2
XeF4
XeF6
CsF | BaF2 | *  | HfF4 | TaF5 | WF4
WF6 | ReF4
ReF5
ReF6
ReF7 | OsF4
OsF5
OsF6 | IrF3
IrF5
IrF6 | PtF4
PtF6 | AuF3
Au2F10
AuF5·F2
| HgF2
Hg2F2 | TlF
TlF3 | PbF2
PbF4 | BiF3
BiF5 | Po | At | RnF2
Fr | Ra | **  | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og
|  | ↓ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| * | LaF3 | CeF3 | Pr | NdF3 | PmF3 | SmF3
| Eu | Gd | Tb | DyF3 | Ho | Er | Tm | YbF3
| Lu |
| ** | AcF3 | ThF4 | Pa | UF3
UF4
UF5
UF6 | NpF3
NpF4
NpF5
NpF6
| PuF3
PuF4
PuF5
PuF6 | AmF3
AmF4 | CmF3 | Bk | Cf | Es | Fm | Md | No | Lr |

Other|

* AgBF4
* AgPF6
* Cs2AlF5
* K3AlF6
* Na3AlF6
* KAsF6
* LiAsF6
* NaAsF6
* HBF4
* KBF4
* LiBF4
* NaBF4
* RbBF4
* Ba(BF4)2
* Ni(BF4)2
* Pb(BF4)2
* Sn(BF4)2
* BaClF
* BaSiF6
* BaGeF6
* BrOF3
* BrO2F
* CBrF3
* CBr2F2
* CBr3F
* CClF3
* CCl2F2
* CCl3F
* CFN
* CF2O
* CF3I
* CHF3
* CH2F2
* CH3F
* C2Cl3F3
* C2H3F
* C6H5F
* C7H5F3
* C15F33N
* ClFO2
* CrFO4
* CrF2O2
* CsBF4
* NH4F
* FNO
* FNO2
* FNO3
* KHF2
* NaHF2
* ThOF2
* NH5F2
* (NH4)2SiF6
* F2OS
* F3OP
* PSF3
* HPF6
* HSbF6
* NH4PF6
* KPF6
* KSbF6
* LiPF6
* NaPF6
* NaSbF6
* Na2SiF6
* Na2TiF6
* Na2ZrF6
* TlPF6
* IOF3
* K2NbF7
* K2TaF7
* IO3F
* UO2F2

Chemical formulas

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