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Ruthenium pentacarbonyl

Names
Other names Pentacarbonylruthenium
Identifiers
CAS Number	16406-48-7
3D model (JSmol)	Interactive image
ChemSpider	65793305
PubChem CID	11053793
InChI InChI=1S/5CO.Ru/c5*1-2;Key: UMIQWFOHGPOVPP-UHFFFAOYSA-N
SMILES C(=O)=(=C=O)(=C=O)(=C=O)=C=O
Properties
Chemical formula	Ru(CO)5
Molar mass	241.12
Appearance	colorless liquid
Melting point	−16–17 °C (3–63 °F; 257–290 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Ruthenium pentacarbonyl is the organoruthenium compound with the formula Ru(CO)₅. It is a colorless, light-sensitive liquid that readily decarbonylates upon standing at room temperature. It is of academic interest as an intermediate for the synthesis of metal carbonyl complexes.

Preparation

Ru(CO)₅ was originally prepared by carbonylation of ruthenium salts in the presence of a reducing agent. A more recent preparation involves photolysis of triruthenium dodecacarbonyl in the presence of carbon monoxide:

Ru₃(CO)₁₂ + 3 CO ⇌ 3 Ru(CO)₅

It is characterized by two intense ν_CO bands in the IR spectrum at 2038 and 2003 cm (hexane solution).

Comparisons of M(CO)₅ (M = Fe, Ru, Os)

Whereas Fe(CO)₅ is completely robust at room temperature, samples of Ru(CO)₅ are typically reddish owing to contamination by Ru₃(CO)₁₂. The conversion is rapid in solution. Os(CO)₅ requires heating to 80 °C to effect conversion to triosmium dodecacarbonyl.

References

1. ^ Rushman, Paul; Van Buuren, Gilbert N.; Shiralian, Mahmoud; Pomeroy, Roland K. (1983). "Properties of the Pentacarbonyls of Ruthenium and Osmium". Organometallics. 2 (5): 693–694. doi:10.1021/om00077a026.
2. ^ Adams, R. D.; Barnard, T. S.; Cortopassi, J. E.; Wu, W.; Li, Z. "Platinum-ruthenium carbonyl cluster complexes" Inorganic Syntheses 1998, volume 32, pp. 280-284. doi:10.1002/9780470132630.ch44
3. W. Manchot, Wilhelm J. Manchot "Darstellung von Rutheniumcarbonylen und -nitrosylen" Zeitschrift für Anorganische und Allgemeine Chemie 1936, volume 226, pp. 385-415. doi:10.1002/zaac.19362260410

• Organoruthenium compounds
• Carbonyl complexes