Rhodium hexafluoride, also rhodium(VI) fluoride, (RhF6) is the inorganic compound of rhodium and fluorine. A black volatile solid,[1] it is a highly reactive material, and a rare example of a rhodium(VI) compound. It is one of seventeen known binary hexafluorides.
-fluoride.svg) | |
| Names | |
|---|---|
| IUPAC name rhodium(VI) fluoride | |
| Other names rhodium hexafluoride | |
| Identifiers | |
3D model (JSmol) | |
PubChem CID | |
CompTox Dashboard (EPA) | |
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| Properties | |
| F6Rh | |
| Molar mass | 216.91 g/mol |
| Appearance | black crystalline solid[1] |
| Density | 3.71g/mL[2] |
| Melting point | ≈ 70 °C (158 °F; 343 K)[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Synthesis, structure, properties
Rhodium hexafluoride is prepared by reaction of rhodium metal with an excess of elemental fluorine:[3]
- Rh + 3 F2 → RhF6
The RhF6 molecule has octahedral molecular geometry. Consistent with its d3 configuration, the six Rh–F bond lengths are equivalent, being 1.824 Å.[2] 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,[3] and can even react with elemental oxygen.[4]
References
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.
