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Journal of Cluster Science

, Volume 16, Issue 2, pp 127–150 | Cite as

Use of the Cationic Fragments [Ru(η5-C5H5) (MeCN)3]+ and [M(η6-C6H5R)(MeCN)3]+ (M=Os, Ru; R=H, Me) as Ionic Coupling Reagents in the Synthesis of the Clusters [Os4M2(CO)126-C6H5R)], [Os4M(CO)126-C6H6)(Au2dppm)] and [Os5Ru(CO)155-C5H5)(AuPPh3)]*

  • Muna R. A. Al-Mandhary
  • Radchada Buntem
  • Cheryl L. Doherty
  • Andrew J. Edwards
  • John F. Gallagher
  • Jack Lewis
  • Chi-Keung Li
  • Paul R. Raithby
  • M. Carmen Ramirez de Arellano
  • Gregory P. Shields
Article

Abstract

The clusters [H2Os4M(CO)12eta6-C6H6)] (M=Os, Ru) may be deprotonated to generate anions [Os4M(CO)12eta6-C6H6)]2- which react with [M′eta6-C6H5R) (MeCN)3]2+(M=Os, Ru; R=H, Me) to give the bicapped tetrahedral clusters [Os4(CO)12MM′eta6-C6H5R)2]. Whereas [Os4(CO)12M2eta6-C6H6)2] (M=Os, Ru) have one Meta6-C6H6) unit in a site connected to three other metals, {3}, and one in a site connected to four other metals, {4}, [Os4(CO)12OsRueta6-C6H6)2] has the Rueta6-C6H6) unit in the {3} site irrespective of whether the Os or Ru anion is capped. Coupling of these anions with Au2dppm yields [Os4M(CO)12eta6-C6H6)(Au2dppm)] (M=Os, Ru), which have the arene ligand in the axial site of a trigonal bipyramid and the digold unit capping two faces. Reduction of [H2Os5(CO)15] with K/Ph2CO and coupling with [Rueta5-C5H5)(MeCN)3]2+yields the monoanion [Os5(CO)15Rueta5-C5H5)] which reacts with [AuPPh3]+ generating [Os5(CO)15Rueta5-C5H5)(AuPPh3)] with the “Ru(C5H5)” unit in the terminal {3} site.

Keywords:

Carbonyl cluster osmium ruthenium gold cyclopentadienyl X-ray crystal structures 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Muna R. A. Al-Mandhary
    • 1
  • Radchada Buntem
    • 1
  • Cheryl L. Doherty
    • 2
  • Andrew J. Edwards
    • 1
  • John F. Gallagher
    • 1
  • Jack Lewis
    • 1
  • Chi-Keung Li
    • 1
  • Paul R. Raithby
    • 2
    • 3
  • M. Carmen Ramirez de Arellano
    • 1
  • Gregory P. Shields
    • 1
  1. 1.Department of ChemistryUniversity of CambridgeCambridgeUK
  2. 2.Department of ChemistryUniversity of BathBathUK
  3. 3.CCLRC Daresbury LaboratoryDaresburyUK

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