1570082-57-3Relevant academic research and scientific papers
A metallacyclic alkyl-amido carbene complex (MCAAC)
Trapp, Ina,Gonzalez-Gallardo, Sandra,Hohnstein, Silvia,Garnier, Delphine,Ona-Burgos, Pascual,Breher, Frank
, p. 4313 - 4319 (2014)
The activation of the CN moiety in the redox-active metalloligand [CpRu{κ3Npz-1}][PF6] (2) (1: ambidentate hybrid ligand, NC-C(pz)3, with pz = pyrazolyl) was observed in the reaction with [Ir(cod)Cl]2 (cod = 1,5-cyclooctadiene). By performing detailed NMR spectroscopic and X-ray crystallographic investigations the product was found to be a bimetallic RuII-IrIII complex of the composition [CpRu{μ-1′}Ir(cod)Cl2][PF6] (3) consisting of a chemically modified ligand 1′. Most notably, the heterobimetallic complex 3 features an unprecedented metallacyclic alkyl-amido carbene (MCAAC) core structure, which is coordinated to an IrIII centre. Density functional theory (DFT) calculations as well as cyclic voltammetry (CV) studies were performed in an effort to establish the formal oxidation states of the metal atoms in 3. Indeed, a quasi-reversible oxidation wave was detected at E01/2 = 0.36 V, which was attributed to the Ru II/RuIII redox couple, while two irreversible reduction processes were observed at very negative potentials and have been assigned to the stepwise reduction of IrIII to IrI. First efforts to elucidate the reaction mechanism have also been performed.
