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)=[Ru](=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[1] °C (3–63 °F; 257–290 K)

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

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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.[2]

## Preparation

Ru(CO)5 was originally prepared by carbonylation of ruthenium salts in the presence of a reducing agent.[3] A more recent preparation involves photolysis of triruthenium dodecacarbonyl in the presence of carbon monoxide:[2]

Ru3(CO)12 \+ 3 CO ⇌ 3 Ru(CO)5

It is characterized by two intense νCO bands in the IR spectrum at 2038 and 2003 cm−1 (hexane solution).[2]

## 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.[1]

## References

1. ↑ 1.0 1.1 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. ↑ 2.0 2.1 2.2 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

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Ruthenium compounds

Ru(0)|

* Ru3(CO)12
* Ru(P(C6H5)3)3(CO)2

Ru(I)|

* (C5(C6H5)4O)2H(Ru(CO)2)2H

Ru(II)|

* RuB2
* Na4Ru(N2C12H6(C6H4SO3)2)3
* (Ru((NC5H4)2)3)Cl2
* Ru(P(C6H5)3)3Cl2
* Ru(SO(CH3)2)4Cl2
* (RuCl2C6H4CH3CH(CH3)2)2
* RuClC5H5(P(C6H5)3)2
* C43H72Cl2P2Ru
* (C5H5)2Ru

Ru(III)|

* RuCl3

Ru(IV)|

* RuO2
* Sr2RuO4

Ru(V)|

* RuF5

Ru(VI)|

* RuF6

Ru(VII)|

* N(C3H7)4RuO4

Ru(VIII)|

* RuO4

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