841254-87-3Relevant academic research and scientific papers
The synthesis of [FeRu(CO)2(μ-CO)2(η-C 5H5)(η-C5Me5)] and convenient entries to its organometallic chemistry
Dennett, James N. L.,Knox, Selby A. R.,Anderson, Kirsty M.,Charmant, Jonathan P. H.,Orpen, A. Guy
, p. 63 - 73 (2005)
The synthesis, fluxionality and reactivity of the heterobimetallic complex [FeRu(CO)2(μ-CO)2(η-C5H 5)(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-η1:η 3-C(O)CR″CR′}(η-C5H 5)-(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-η2:η 2-CPhCPh)(η-C5H5)(η-C 5Me5)] (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-η1:η 1-C=C(CO2Me)3}(η-C5H 5)(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-CHCH 3)(η-C5H5)(η-C5Me 5)] (27) via the ionic vinyl species [FeRu(CO) 2(μ-CO)(μ-η1:η2CH=CH 2)(η-C5H5)(η-C5Me 5)][BF4] (25). Compound 25 exhibits cis/trans isomerisation at room temperature. Protonation of 11 gives the allenyl species [FeRu(CO)2(μ-CO)(μ-η1:η 2-CH=C=CMe2)(η-C5H 5)(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.
