Osmium hexafluoride

Unit cell of osmium hexafluoride.

Names
IUPAC name

osmium(VI) fluoride

Other names

osmium hexafluoride

Identifiers

CAS Number

* 13768-38-2 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 109930

PubChem CID

* 123327

UNII |

* 1G36E253R5 Y

InChI

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

Key: MLKFZZUUYQWFMO-UHFFFAOYSA-H

* InChI=1/6FH.Os/h6*1H;/q;;;;;;+6/p-6/rF6Os/c1-7(2,3,4,5)6

Key: MLKFZZUUYQWFMO-ZXTFGAQLAX

SMILES

* F[Os](F)(F)(F)(F)F

Properties

Chemical formula

| OsF6
Molar mass | 304.22 g/mol
Appearance  | yellow crystalline solid[1]
Density | 5.09g/mL[2]
Melting point |  33.4 °C (92.1 °F; 306.5 K)[1]
Boiling point |  47.5 °C (117.5 °F; 320.6 K)[1]
Structure

Space group

| Pnma, No. 62

Lattice constant

a = 938.7 pm, b = 854.3 pm, c = 494.4 pm[3]

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

Infobox references

Tracking categories (test):

* SizeSet

Osmium hexafluoride, also osmium(VI) fluoride, (OsF6) is a compound of osmium and fluorine, and one of the seventeen known binary hexafluorides.

## Contents

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

## Synthesis

Osmium hexafluoride is made by a direct reaction of osmium metal exposed to an excess of elemental fluorine gas at 300 °C.

Os \+ 3 F2 → OsF6

## Description

Osmium hexafluoride is a yellow crystalline solid that melts at 33.4 °C and boils at 47.5 °C.[1] The solid structure measured at −140 °C is orthorhombic space group Pnma. Lattice parameters are a = 9.387 Å, b = 8.543 Å, and c = 4.944 Å. There are four formula units (in this case, discrete molecules) per unit cell, giving a density of 5.09 g·cm−3.[2]

The OsF6 molecule itself (the form important for the liquid or gas phase) has octahedral molecular geometry, which has point group (Oh). The Os–F bond length is 1.827 Å.[2]

Partial hydrolysis of OsF6 produces OsOF4.[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. (2006). "Solid State Molecular Structures of Transition Metal Hexafluorides". Inorganic Chemistry 45 (9): 3782–3788. doi:10.1021/ic052029f. PMID 16634614.
3. ↑ Drews, Thomas; Supeł, Joanna; Hagenbach, Adelheid; Seppelt, Konrad (2006). "Solid State Molecular Structures of Transition Metal Hexafluorides". Inorganic Chemistry 45 (9): 3782–3788. doi:10.1021/ic052029f. PMID 16634614.
4. ↑ Paine, R. T. (1 June 1973). "Partial hydrolysis of rhenium and osmium hexafluorides. An improved synthesis and characterization of rhenium oxide tetrafluoride". Inorganic Chemistry 12 (6): 1457–1458. doi:10.1021/ic50124a060.

## Further reading

* Gmelins Handbuch der anorganischen Chemie, System Nr. 53, Osmium, Supplement Volume 1, pp. 111–114.

## External links

* Osmium hexafluoride at webelements.com.

* v
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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
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* e

Osmium compounds

Os(0)|

* Os3(CO)12

Os(0,I)|

* H2Os3(CO)10

Os(I)|

* OsB

Os(I,II)|

* Os2B3

Os(II)|

* OsB2

| Organoosmium(II) compounds|

* Os(C5H5)2

|

Os(IV)|

* OsO2
* OsCl4

Os(VI)|

* OsF6

Os(VIII)|

* OsO4
* OsS4

* v
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* e

Salts and covalent derivatives of the fluoride ion

HF |  |  |  | He

|
|
|
|

LiF | BeF2 | BF
BF3
B2F4 | CF4
other compounds | NF3
FN3
N2F2
N2F4
NF5§  | F2O
F2O2
other compounds | F2 | Ne
NaF | MgF2 | AlF
AlF3 | SiF4 | P2F4
PF3
PF5 | S2F2
SF2
SF4
SF6 | ClF
ClF3
ClF5 | Ar
KF | CaF
CaF2 | ScF3 | TiF2
TiF3
TiF4 | VF2
VF3
VF4
VF5 | CrF2
CrF3
CrF4
CrF5
CrF6§  | MnF2 | FeF2
FeF3 | CoF2
CoF3 | NiF2 | CuF
CuF2 | ZnF2 | GaF2
GaF3 | GeF2
GeF4 | AsF3
AsF5 | Se2F2
SeF4
SeF6 | BrF
BrF3
BrF5 | KrF2
RbF | SrF
SrF2 | YF3 | ZrF3
ZrF4 | NbF4
NbF5 | MoF2
MoF3
MoF4
MoF5
MoF6 | TcF4
TcF6 | RuF3
RuF5
RuF6 | RhF3
RhF5
RhF6 | PdF2 | AgF | CdF2 | InF
InF2
InF3 | SnF2
SnF4 | SbF3
SbF5 | Te3F2
TeF4
TeF6 | IF
IF3</br>IF5</br>IF7 | XeF2
XeF4
XeF6
CsF | BaF2 |  | HfF4 | TaF5 | WF2
WF3
WF4
WF5
WF6 | Re3F9
ReF4
ReF5
ReF6
ReF7 | OsF4
OsF5
OsF6 | IrF2
IrF3
IrF4
IrF5
IrF6 | PtF2
PtF4
PtF5
PtF6 | AuF
AuF3
Au2F10
AuF5•F2 | Hg2F2
HgF2
HgF4 | TlF | PbF2
PbF4 | BiF3
BiF5 | PoF2
PoF4
PoF6 | AtF  | RnF2
FrF | RaF2 |  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
LaF3 | CeF3
CeF4 | PrF3 | NdF2,
NdF3 | PmF3 | SmF2,
SmF3 | EuF2,
EuF3 | GdF3 | TbF3 | DyF2,
DyF3 | HoF3 | ErF3 | TmF2
TmF3 | YbF2
YbF3 | LuF3
AcF3 | ThF4 | PaF5 | UF3
UF4
UF5
UF6 | NpF4
NpF6 | PuF3
PuF6 | AmF2
AmF3 | CmF3 | BkF3 | CfF3 | EsF3 | Fm  | Md  | No  | LrF3

§ means the substance has not been made.

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