Jump to main content
Jump to site search

Issue 1, 2005
Previous Article Next Article

The synthesis of [FeRu(CO)2(μ-CO)2(η-C5H5)(η-C5Me5)] and convenient entries to its organometallic chemistry

Author affiliations

Abstract

The synthesis, fluxionality and reactivity of the heterobimetallic complex [FeRu(CO)2(μ-CO)2(η-C5H5)(η-C5Me5)] (5) are described. Complex 5 exhibits enhanced photolytic reactivity towards alkynes compared to its homometallic analogues, forming the dimetallacyclopentenone complexes [FeRu(CO)(μ-CO){μ-η13-C(O)CR″CR′}(η-C5H5)(η-C5Me5)] (9, R′ = R″ = H; 10, R′ = R″ = CO2Me; 11, R′ = H, R″ = CMe2OH). Prolonged photolysis with diphenylethyne gives the dimetallatetrahedrane complex [FeRu(μ-CO)(μ-η22-CPhCPh)(η-C5H5)(η-C5Me5)] (17), which contains the first iron–ruthenium double bond. Complexes containing a number of organic fragments can be synthesised using 9, 10 and 11. Heating a solution of 10 gave the alkenylidene complex [FeRu(CO)2(μ-CO){μ-η11-C[double bond, length as m-dash]C(CO2Me)2}(η-C5H5)(η-C5Me5)] (23) through an unusual methylcarboxylate migration. Protonation and then addition of hydride to 9 gives the ethylidene complex [FeRu(CO)2(μ-CO)(μ-CHCH3)(η-C5H5)(η-C5Me5)] (27) via the ionic vinyl species [FeRu(CO)2(μ-CO)(μ-η12-CH[double bond, length as m-dash]CH2)(η-C5H5)(η-C5Me5)][BF4] (25). Compound 25 exhibits cis/trans isomerisation at room temperature. Protonation of 11 gives the allenyl species [FeRu(CO)2(μ-CO)(μ-η12-CH[double bond, length as m-dash]C[double bond, length as m-dash]CMe2)(η-C5H5)(η-C5Me5)][BF4] (30). Compound 30 exist as three isomers, two cis and one trans. The two cis isomers are shown to be interconverting by σ–π isomerisation. The solid state structures of 5, 11, 12, 17, 23, 25 and 30 were established by X-ray crystallography and are discussed.

Graphical abstract: The synthesis of [FeRu(CO)2(μ-CO)2(η-C5H5)(η-C5Me5)] and convenient entries to its organometallic chemistry

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Sep 2004, accepted on 05 Nov 2004 and first published on 29 Nov 2004


Article type: Paper
DOI: 10.1039/B414412K
Citation: Dalton Trans., 2005,0, 63-73
  •   Request permissions

    The synthesis of [FeRu(CO)2(μ-CO)2(η-C5H5)(η-C5Me5)] and convenient entries to its organometallic chemistry

    J. N. L. Dennett, S. A. R. Knox, K. M. Anderson, J. P. H. Charmant and A. G. Orpen, Dalton Trans., 2005, 0, 63
    DOI: 10.1039/B414412K

Search articles by author

Spotlight

Advertisements