Ruthenium hexafluoride
Chemical compound
From Wikipedia, the free encyclopedia
Ruthenium hexafluoride, also ruthenium(VI) fluoride (RuF6), is a compound of ruthenium and fluorine and one of the seventeen known binary hexafluorides.
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| Names | |||
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| IUPAC name
ruthenium(VI) fluoride | |||
| Other names
ruthenium(6+) hexafluoride | |||
| Identifiers | |||
3D model (JSmol) |
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PubChem CID |
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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 | 3.54 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).
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-fluoride.svg)
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]
