Ruthenium hexafluoride

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Ruthenium hexafluoride
Ruthenium(VI)-fluoride.svg
Ruthenium-hexafluoride-3D-balls.png
Names
IUPAC name
ruthenium(VI) fluoride
Other names
ruthenium(6+) hexafluoride
Identifiers
3D model (JSmol)
ChemSpider
PubChem CID
  • InChI=1/6FH.2Ru/h6*1H;;/q;;;;;;+6/p-6
    Key: NHWBVRAPBLSUQQ-UHFFFAOYSA-H
  • F[Ru](F)(F)(F)(F)F
Properties
RuF6
Molar mass 215.07 g/mol
Appearancedark brown crystalline solid [1]
Density 3.54 g/cm3
Melting point 54 °C (129 °F; 327 K) [1]
Boiling point 200 °C (392 °F, 473.15 K) (decomposes) [2]
reacts
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Ruthenium hexafluoride, also ruthenium(VI) fluoride (RuF6), is a compound of ruthenium and fluorine and one of the seventeen known binary hexafluorides.

Contents

History and synthesis

Ruthenium hexafluoride was discovered by American radiochemists in 1961, soon after the discovery of technetium hexafluoride. [3] It is made by a direct reaction of ruthenium metal in a gas stream of fluorine and argon at 400–450 °C. The yields of this reaction are less than 10%. [4]

Ru + 3 F
2 → RuF
6

Description

Ruthenium hexafluoride is a dark brown crystalline solid that melts at 54 °C. [1] The solid structure measured at −140 °C is orthorhombic space group Pnma. Lattice parameters are a = 9.313  Å, b = 8.484 Å, and c = 4.910 Å. There are four formula units (in this case, discrete molecules) per unit cell, giving a density of 3.68 g·cm−3. [4]

The RuF6 molecule itself (the form important for the liquid or gas phase) has octahedral molecular geometry, which has point group ( Oh ). The Ru–F bond length is 1.818 Å. [4]

References

  1. 1 2 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. ↑ Haynes, William M (2014-06-04). CRC Handbook of Chemistry and Physics, 95th Edition. CRC Press. ISBN   9781482208689.
  3. ↑ Claassen, Howard H.; Selig, Henry; Malm, John G.; Chernick, Cedric L.; Weinstock, Bernard (1961). "RUTHENIUM HEXAFLUORIDE1" . Journal of the American Chemical Society. 83 (10): 2390–2391. Bibcode:1961JAChS..83.2390C. doi:10.1021/ja01471a039. ISSN   0002-7863.
  4. 1 2 3 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.

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