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Rhodium hexafluoride

Names
IUPAC name rhodium(VI) fluoride
Other names rhodium hexafluoride
Identifiers
CAS Number	13693-07-7
3D model (JSmol)	Interactive image
PubChem CID	20488757
CompTox Dashboard (EPA)	DTXSID80608008
InChI Key: PDNXMXVYNVZBTD-UHFFFAOYSA-H InChI=1/6FH.2Rh/h6*1H;;/q;;;;;;+6/p-6
SMILES F(F)(F)(F)(F)F
Properties
Chemical formula	F6Rh
Molar mass	216.91 g/mol
Appearance	black crystalline solid
Density	3.71g/mL
Melting point	≈ 70 °C (158 °F; 343 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Rhodium hexafluoride, also rhodium(VI) fluoride, (RhF₆) is the inorganic compound of rhodium and fluorine. A black volatile solid, it is a highly reactive material which starts to slowly thermally decompose already at room temperature and a rare example of a rhodium(VI) compound. It is one of seventeen known binary hexafluorides.

Rhodium hexafluoride was discovered by American radiochemists in 1961, soon after the discovery of ruthenium hexafluoride. It is prepared by reaction of rhodium metal with an excess of elemental fluorine:

Rh + 3 F₂ → RhF₆

The RhF₆ molecule has octahedral molecular geometry. Consistent with its d configuration, the six Rh–F bond lengths are equivalent, being 1.824 Å. It crystallises in an orthorhombic space group Pnma with lattice parameters of a = 9.323 Å, b = 8.474 Å, and c = 4.910 Å.

Like some other metal fluorides, RhF₆ is highly oxidizing. It attacks glass, and can even react with elemental oxygen.

References

1. ^ 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. ^ 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. Chernick, Cedric L.; Claassen, Howard H.; Weinstock, Bernard (1961). "RHODIUM HEXAFLUORIDE". Journal of the American Chemical Society. 83 (14): 3165–3166. doi:10.1021/ja01475a046. ISSN 0002-7863.
4. ^ 《无机化学丛书》第九卷：锰分族、铁系、铂系 (in Chinese). 北京: 科学出版社. 1991. p. 478. ISBN 7-03-002238-6.
5. Riedel, Sebastian; Kaupp, Martin (2009). "The highest oxidation states of the transition metal elements" (PDF). Coordination Chemistry Reviews. 253 (5–6). Elsevier: 606–624. doi:10.1016/j.ccr.2008.07.014.

Further reading

• Gmelins Handbuch der anorganischen Chemie, System Nr. 63, Rhodium, Part B1, pp. 266–268.

External links

• Media related to Rhodium hexafluoride at Wikimedia Commons
• Rhodium hexafluoride at webelements.com.

• Rhodium compounds
• Hexafluorides
• Octahedral compounds
• Platinum group halides