Hexanuclear and pentanuclear benzene carbido clusters: Synthesis, characterisation and molecular structures of [Os6C(Co)146- C6H6)]

Janesse Wing Sze Hui, Wing Tak Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

Reaction of the pentaosmium-carbido dianion [Os5C(CO)14]2-1 with [Os(C6H6)(MeCN)3]2+gave [Os6C(CO)14(η6-C6H6)] 2 in fair yield; while the corresponding reaction with [Ru(C6H6)(MeCN)3]2+gave [RuOs5C(CO)14(η6-C6H6)] 3 in moderate yield. Treatment of 3 with carbon monoxide produces an unstable species [RuOs5C(CO)15(η6-C6H6)] 4a, which on standing in CH2Cl2undergoes fragmentation to give the species [RuOs4C(CO)12(η6-C6H6)] 4b or decarbonylation to 3. Clusters 2, 3 and 4b have been fully characterised by both spectroscopic and crystallographic methods. The X-ray structure analysis shows that both 2 and 3 are isomorphous. Both molecules contain an octahedral cavity accommodating an interstitial C(carbide) atom, with the η6-C6H6coordinated to the Ru or Os atom in an apical position. Cluster 4b is an unprecedented pentanuclear osmium - ruthenium mixed-metal carbido cluster containing an η6-coordinated benzene ligand.
Original languageEnglish
Pages (from-to)211-217
Number of pages7
JournalJournal of Organometallic Chemistry
Volume524
Issue number1-2
DOIs
Publication statusPublished - 1 Nov 1996
Externally publishedYes

Keywords

  • Arene
  • Carbido
  • Cluster
  • Osmium

ASJC Scopus subject areas

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

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