Rhenium hexafluoride

Names
IUPAC name

rhenium(VI) fluoride

Other names

rhenium hexafluoride

Identifiers

CAS Number

* 10049-17-9

3D model (JSmol)

* Interactive image

EC Number |

* 233-172-2

PubChem CID

* 66231

UNII |

* U1FW6E300T Y

InChI

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

SMILES

* F[Re](F)(F)(F)(F)F

Properties

Chemical formula

| F6Re
Molar mass | 300.20 g/mol
Appearance  | liquid, or yellow crystalline solid[1]
Density | 4.94g/mL[2]
Melting point |  18.5 °C (65.3 °F; 291.6 K)[1]
Boiling point |  33.7 °C (92.7 °F; 306.8 K)[1]

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

Infobox references

Rhenium hexafluoride, also rhenium(VI) fluoride, (ReF6) is a compound of rhenium and fluorine and one of the seventeen known binary hexafluorides.

## Contents

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

## Synthesis

Rhenium hexafluoride is made by combining rhenium heptafluoride with additional rhenium metal at 300 °C in a pressure vessel.[2]

6 ReF7 \+ Re → 7 ReF6

## Description

Rhenium hexafluoride is a liquid at room temperature. At 18.5 °C, it freezes into a yellow solid. The boiling point is 33.7 °C.[1]

The solid structure measured at −140 °C is orthorhombic space group Pnma. Lattice parameters are a = 9.417 Å, b = 8.570 Å, and c = 4.965 Å. There are four formula units (in this case, discrete molecules) per unit cell, giving a density of 4.94 g·cm−3.[2]

The ReF6 molecule itself (the form important for the liquid or gas phase) has octahedral molecular geometry, which has point group (Oh). The Re–F bond length is 1.823 Å.[2]

## Use

Rhenium hexafluoride is a commercial material used in the electronics industry for depositing films of rhenium.[3]

## 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 2.3 T. Drews, J. Supeł, A. Hagenbach, K. Seppelt: "Solid State Molecular Structures of Transition Metal Hexafluorides", in: Inorganic Chemistry, 2006, 45 (9), S. 3782–3788; doi:10.1021/ic052029f; PMID 16634614.
3. ↑ Meshri, D. T. (2000). "Fluorine Compounds, Inorganic, Rhenium". Kirk-Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.1808051413051908.a01. ISBN 0471238961.

## Further reading

* Gmelins Handbuch der anorganischen Chemie, System Nr. 70, Rhenium, Part A, pp. 102–105.

## External links

* Rhenium hexafluoride at webelements.com.

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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

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Rhenium compounds

Rhenium(0)|

| Organorhenium(0)|

* Re2(CO)10

|

Rhenium(I)|

| Organorhenium(I)|

* Re(CO)5Br
* ReH(CO)5

|

Rhenium(II)|

* ReB2

Rhenium(III)|

* ReCl3

Rhenium(IV)|

* ReO2
* ReS2
* ReSe2
* ReTe2

Rhenium(V)|

* ReOCl3(P(C6H5)3)2
* ReCl5

Rhenium(VI)|

* ReF6
* ReO3

Rhenium(VII)|

* ReF7
* Re2O7
* Re2S7
* Re2O7(OH2)2
* NH4ReO4
* NaReO4
* K2ReH9

| Organorhenium(VII)|

* CH3ReO3

|

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