Rhodium hexafluoride

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Rhodium hexafluoride
IUPAC name

rhodium(VI) fluoride

Other names

rhodium hexafluoride

Identifiers
CAS number 13693-07-7

 Jmol-3D images {{#if:F[Rh](F)(F)(F)(F)F|Image 1
Properties
Molecular formula F6Rh
Molar mass 216.90 g mol−1
Appearance black crystalline solid[1]
Density 3.71g/mL[2]
Melting point ≈ 70 °C[1]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Rhodium hexafluoride, also rhodium(VI) fluoride, (RhF6) is the inorganic compound of rhodium and fluorine. A black volatile solid,[1] it is highly reactive material, a rare example of rhodium(VI) compound.

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 oxidising. It attacks even glass even in the absence of water.[3] It can even react with elemental oxygen.[4]

References

  1. ↑ 1.0 1.1 1.2 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 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. ↑ 3.0 3.1 (Chinese)《无机化学丛书》第九卷：锰分族、铁系、铂系. 北京: 科学出版社. p. 478. ISBN 7-03-002238-6. 
  4. ↑ Riedel, Sebastian; Kaupp, Martin (2009). "The highest oxidation states of the transition metal elements". Coordination Chemistry Reviews (Elsevier) 253: 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

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