Synthesis, characterization and crystal structures of new difurylphosphido-bridged dinuclear ruthenium carbonyl complexes derived from ferrocenylacetylene ligands

Wai Yeung WONG*, Fai Lung Ting, Pui Ling Lau

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

3 Citations (Scopus)

Abstract

The difurylphosphido-bridged dinuclear complex [Ru2(CO) 6(μ-PFu2)(μ-η12-Fu)] (Fu = 2-furyl) 1 readily reacts with two equivalents of each of the terminal alkynes HC = CR (R = Fc, p-C6H4Fc, p-C6H 4NO2, Fc = Fe(η5-C5H 5)(η5-C5H4)) by an interesting head-to-tail ynyl coupling with a furan group to form a series of phosphido-bridged diruthenium compounds containing a novel furyl-substituted C4 hydrocarbyl chain of stoichiometry [Ru2(CO) 4(μ-PFu2){μ-η11, η23-RCC(H)C(R)C(H)Fu}] (R = Fc 2, p-C 6H4Fc 3, p-C6H4NO2 4) in moderate to good yields. Reaction of 1 with an equimolar amount of HC = CFc and HC= C(p-C6H4NO2) afforded a pair of isomers of [Ru2(CO)4(μ-PFu2){μ-η1, η123-R1CC(H)C(R 2)C(H)Fu}] (R1 = Fc, R2 = p-C6H 4NO2 5a; R1 = p-C6H 4NO2, R2 = Fc 5b) together with a small mixture of 4. X-ray crystal structures of 2, 3, 5a and 5b are reported. All of these new alkyne-derived dinuclear complexes are electron precise with 34 cluster valence electrons in which the μ-η12-furyl ligand acts as a three-electron donor and the μ-phosphido Ru2 framework is retained in the products upon alkyne coupling reactions. The resulting organic fragment of each complex is coordinated to the Ru atoms via a π, a π-allyl and two σ bonds, and donates seven electrons to the metal core.

Original languageEnglish
Pages (from-to)231-245
Number of pages15
JournalJournal of Cluster Science
Volume19
Issue number1
DOIs
Publication statusPublished - Mar 2008

Scopus Subject Areas

  • Biochemistry
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

User-Defined Keywords

  • Alkynes
  • Crystal structures
  • Ferrocene
  • Phosphido ligands
  • Ruthenium

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