Cluster build-up reactions via the ionic coupling of tetraosmium anions and the [RhCp*(NCMe)3]2+ cation; The crystal and molecular structures of [Os4Rh(μ-H)3(MeC=NH)(CO)115-Cp*)], [Os4Rh(μ-H)2(CO)135-Cp *)]

William Clegg, Neil Feeder, Ana M. Martin Castro, Saifun Nahar, Paul R. Raithby, Gregory P. Shields, Simon J. Teat

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The reaction of [Os4H4(CO)11]2- 2, formed by the reduction of [Os4H4(CO)12] 1 with K/Ph2CO, with the cation [Rh(η5-Cp*)(MeCN)3]2+ (Cp*=C5Me5) 3, affords a number of penta- and hexanuclear mixed-metal clusters depending on the reaction conditions. If only sufficient K/Ph2CO is added to dissolve all of 1, and the dication 3 added, a low yield of a blue cluster [Os4Rh(μ-H)3(MeC=NH)(CO)115-Cp*)] (Cp*=C5Me5) 4 is obtained in addition to large quantities of 1. If an excess of K/Ph2CO is added so that reduction of 1 is complete, and then the dication 3 added, two new products [Os4Rh(μ-H)2(CO)135-Cp*)] 5 and [Os4Rh2(μ-H)2(CO)115-Cp*)2] 6 are obtained in low yield. The three new complexes have been characterised spectroscopically and crystallographically. Cluster 4 contains the uncommon MeC=NH group coordinated to an edge-bridged tetrahedral metal framework. The metal framework in 5 is also a Rh edge-bridged Os4 tetrahedron while that of 6 is a bicapped tetrahedron, with two Rh atoms face capping two faces of an Os4 tetrahedron.

Original languageEnglish
Pages (from-to)237-246
Number of pages10
JournalJournal of Organometallic Chemistry
Volume573
Issue number1-2
DOIs
Publication statusPublished - 31 Jan 1999

Keywords

  • Cluster
  • Crystal structures
  • Cyclopentadienyl
  • Osmium
  • Rhodium

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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