Ruthenium (V) fluoride

Crystal structure
__ Ru 5+      __ F -
General
Surname	Ruthenium (V) fluoride
other names	Ruthenium pentafluoride
Ratio formula	RuF 5
Brief description	emerald green solid
External identifiers / databases
CAS number 14521-18-7 EC number 238-533-8 ECHA InfoCard 100.035.015 PubChem 15797579 ChemSpider 45743266 Wikidata Q2177832
properties
Molar mass	196 g mol −1
Physical state	firmly
density	3.9 g cm −3
Melting point	86.5 ° C
boiling point	227 ° C
solubility	hydrolysis in water
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Ruthenium (V) fluoride is a chemical compound of ruthenium and is one of the fluorides . It is an emerald green solid.

history

Ruthenium (V) fluoride was first synthesized in 1925 by Otto Ruff and Ernst Vidic. They were actually looking for a ruthenium analogue corresponding to osmium (VI) fluoride , but were unable to synthesize it at the temperatures they could achieve. Instead, the pentafluoride was the only reaction product.

Extraction and presentation

Ruthenium (V) fluoride can be obtained directly from the elements at around 300 ° C.

${\displaystyle \mathrm {2\ Ru+5\ F_{2}\longrightarrow 2\ RuF_{5}} }$

properties

Ruthenium (V) fluoride crystallizes in the monoclinic crystal system in the space group P 2 ₁ / a (space group no. 14, position 3) with the lattice parameters a  = 12.47  Å , b  = 10.01 Å, c  = 5.42 Å and β  = 99.5 ° and eight formula units per unit cell . It forms tetramers in which neighboring ruthenium atoms are linked by fluorine bridges.

Hydrolysis takes place with water , initially a mixture of trivalent and tetravalent ruthenium hydroxides and fluorine is formed . This oxidizes the ruthenium to ruthenium (VIII) oxide . With xenon difluoride as fluoride donor, various ionic compounds are formed in a fluoride transfer reaction depending on the mixing ratio.

${\displaystyle \mathrm {2\,XeF_{2}+RuF_{5}\rightarrow [Xe_{2}F_{3}][RuF_{6}]} }$

${\displaystyle \mathrm {XeF_{2}+RuF_{5}\rightarrow [XeF][RuF_{6}]} }$

${\displaystyle \mathrm {XeF_{2}+2\,RuF_{5}\rightarrow [XeF][Ru_{2}F_{11}]} }$

Individual evidence

1. ↑ ^{a b c} J. H. Holloway, RD Peacock, RWH Small: The crystal structure of ruthenium pentafluoride. In: Journal of the Chemical Society. 1964, pp. 644-648, doi : 10.1039 / JR9640000644 .
2. ↑ ^{a b c} ruthenium (V) fluoride at Webelements.com
3. ↑ ^{a b} Tsutomu Sakurai, Akira Takahashi: Behavior of ruthenium in fluoride-volatility processes — V conversions of RuOF ₄ , RuF ₄ , and RuF ₅ into RuO ₄ . In: Journal of Inorganic and Nuclear Chemistry. 1979, 41, 5, pp. 681-685, doi : 10.1016 / 0022-1902 (79) 80354-1 .
4. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
5. ↑ Otto Ruff, Ernst Vidic: The ruthenium pentafluoride and a process for the separation of platinum and ruthenium. In: Journal of Inorganic and General Chemistry. 1925, 143, 1, pp. 163-182, doi : 10.1002 / zaac.19251430112 .
6. ↑ Ralf Steudel : Chemistry of Nonmetals, Syntheses - Structures - Bonding - Use , 4th Edition, 2014 Walter de Gruyter GmbH & Co. KG, Berlin / Boston, ISBN 978-3-11-030439-8 , p. 570, ( accessed via De Gruyter Online).