View source for Ruthenium hexafluoride

{{Chembox
| ImageFileL1 =Ruthenium(VI)-fluoride.svg
| ImageAltL1 =
| ImageFileR1 =Ruthenium-hexafluoride-3D-balls.png
| ImageAltR1=
| IUPACName = ruthenium(VI) fluoride
| OtherNames = ruthenium(6+) hexafluoride
|Section1={{Chembox Identifiers
| CASNo = 13693-08-8
| PubChem = 21528530
| InChI = 1/6FH.2Ru/h6*1H;;/q;;;;;;+6/p-6
| SMILES = F[Ru](F)(F)(F)(F)F
| InChIKey = NHWBVRAPBLSUQQ-UHFFFAOYSA-H
}}
|Section2={{Chembox Properties
| Formula = RuF<sub>6</sub>
| MolarMass = 215.07 g/mol
| Appearance = dark brown crystalline solid<ref name="CRC_HANDBOOK_RuF6"/>
| Density = 3.54 g/cm<sup>3</sup>
| MeltingPtC = 54
| MeltingPt_ref = <ref name="CRC_HANDBOOK_RuF6"/>
| BoilingPt = 200 °C (392 °F, 473.15 K) (decomposes)
| BoilingPt_ref = <ref>{{cite book|url=https://books.google.com/books?id=bNDMBQAAQBAJ|title=CRC Handbook of Chemistry and Physics, 95th Edition|isbn=9781482208689|last1=Haynes|first1=William M|date=2014-06-04|publisher=CRC Press }}</ref>
| Solubility = reacts}}
|Section3={{Chembox Hazards
| MainHazards =
| FlashPt =
| AutoignitionPt = }}
}}
'''Ruthenium hexafluoride''', also '''ruthenium(VI) fluoride''' (RuF<sub>6</sub>), is a compound of [[ruthenium]] and [[fluorine]] and one of the seventeen known binary [[hexafluoride]]s.

== Synthesis ==
Ruthenium hexafluoride is made by a direct reaction of ruthenium metal in a gas stream of [[fluorine]] and [[argon]] at 400–450&nbsp;°C. The yields of this reaction are less than 10%.<ref name="D_BLOCK_XF6"/>

:{{chem|Ru}} + 3 {{chem|F|2}} → {{chem|Ru|F|6}}

== Description ==
Ruthenium hexafluoride is a dark brown crystalline solid that melts at 54&nbsp;°C.<ref name="CRC_HANDBOOK_RuF6"/> The solid structure measured at −140&nbsp;°C is [[Orthorhombic crystal system|orthorhombic]] space group ''Pnma''. [[Lattice constant|Lattice parameters]] are ''a''&nbsp;=&nbsp;9.313&nbsp;[[Angstrom|Å]], ''b''&nbsp;=&nbsp;8.484&nbsp;Å, and ''c''&nbsp;=&nbsp;4.910&nbsp;Å. There are four [[formula unit]]s (in this case, discrete molecules) per [[unit cell]], giving a density of 3.68&nbsp;g·cm<sup>−3</sup>.<ref name="D_BLOCK_XF6"/>

The RuF<sub>6</sub> molecule itself (the form important for the liquid or gas phase) has [[octahedral molecular geometry]], which has point group (''[[octahedral symmetry|O<sub>h</sub>]]'').  The Ru–F [[bond length]] is 1.818&nbsp;Å.<ref name="D_BLOCK_XF6"/>

== References ==
<references>
<ref name="CRC_HANDBOOK_RuF6">''[[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.&nbsp;4-85.</ref>
<ref name="D_BLOCK_XF6">T. Drews, J. Supeł, A. Hagenbach, K. Seppelt: "Solid State Molecular Structures of Transition Metal Hexafluorides", in: ''[[Inorg. Chem.|Inorganic Chemistry]]'', '''2006''', ''45&nbsp;(9)'', S.&nbsp;3782–3788; {{doi|10.1021/ic052029f}}; {{PMID|16634614}}.</ref>
</references>

== Further reading ==
* ''[[Gmelins Handbuch der anorganischen Chemie]]'', System Nr.&nbsp;63, Ruthenium, Supplement, pp. 266–268.

==External links==
*{{Commonscatinline|Ruthenium hexafluoride}}
*[http://www.webelements.com/compounds/ruthenium/ruthenium_hexafluoride.html Ruthenium hexafluoride at webelements.com].

{{Hexafluorides}}
{{Ruthenium compounds}}
{{fluorides}}

[[Category:Ruthenium compounds|Hexafluoride]]
[[Category:Hexafluorides]]
[[Category:Octahedral compounds]]