Metalloligands containing aminofulvene-aldiminate (AFA) ligands and their bimetallic complexes

Philip J. Bailey*, Mahmudur Rahman, Simon Parsons, Muhammad R. Azhar, Fraser J. White

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A simple and convenient route to η5-coordinated Ru and Rh aminofulvene-aldiminate (AFA) complexes is described. The metalloligands [Cp*Ru{η5-(Ph2AFAH)}][BF4] (3), [Cp*Ru{η5-(benzyl2AFAH)}][OTf] (7), [Cp*Rh{η5-(Cy2AFA)H}][BF4]2 (8) and [Cp*Rh{η5-(Cy2AFA)}][BF4] (9) have been synthesised and characterised. The basicity of 9 has been found to be significantly less than its neutral analogue and thus eliminates the need for a deprotonation step to ligate to a second metal in the κ2-N,N′-coordination mode. The reaction of 9 with a palladium precursor provides a mixed-metal complex [Cp*Rh(η52-Cy2AFA)PdCl2][BF4] (12). Cyclic voltammetry studies of the Ph2AFAH ligand shows an irreversible one electron oxidation peak at +1.0 V (vs. Fc/Fc+). Complex 3 shows an irreversible oxidation at +1.5 V and a reduction peak at −1.0 V. The oxidation of 3 occurs on the AFA ligand backbone whereas the structurally analogous neutral 1,2-bis(imidoyl)pentamethyl-ruthenocene shows reversible oxidation at the Ru center.

Original languageEnglish
Pages (from-to)2879-2886
Number of pages8
JournalDalton Transactions
Volume42
Issue number8
DOIs
Publication statusPublished - 2013

Keywords

  • ORGANOMETALLIC CHEMISTRY
  • TRANSITION METALS
  • DERIVATIVES
  • CATALYSTS
  • ETHYLENE
  • RHODIUM
  • COBALT

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