Ruthenium hexafluoride
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| Names | |||
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| IUPAC name
ruthenium(VI) fluoride
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| Other names
ruthenium hexafluoride
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| Identifiers | |||
3D model (JSmol)
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CompTox Dashboard (EPA)
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| Properties | |||
| RuF6 | |||
| Molar mass | 215.07 g/mol | ||
| Appearance | dark brown crystalline solid[1] | ||
| Density | 3.68g/mL[2] | ||
| Melting point | 54 °C (129 °F; 327 K) | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Ruthenium hexafluoride, also ruthenium(VI) fluoride (RuF6), is a compound of ruthenium and fluorine and one of the seventeen known binary hexafluorides.
Synthesis
Ruthenium hexafluoride 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%.[2]
- 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.[2]
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.[2]
References
- ^ a b c 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.
- ^ a b c d 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.
Further reading
- Gmelins Handbuch der anorganischen Chemie, System Nr. 63, Ruthenium, Supplement, pp. 266–268.