925900-72-7Relevant academic research and scientific papers
The insertion reaction of acetonitrile on aryl nickel complexes stabilized by bidentate N,N′-chelating ligands
Ceder, Rosa M.,Muller, Guillermo,Ordinas, Matias,Ordinas, Juan Ignacio
, p. 83 - 90 (2007)
Organometallic complexes to be used as single component precursors in the catalytic dimerization/polymerization of olefins usually must contain a labile ligand that can easily be displaced by the olefin. This is the first step in the activation of the precursor. One commonly used labile ligand is a nitrile. Here we report an example of incompatibility between the nickel or palladium aryl bond and acetonitrile. Neutral [MBr(Mes)NN] complexes in which Mes = 2,4,6-Me3C6H2, NN = diazabutadiene (DAD), pyridinylimine (PIM), 2,2′-bipyridine (bipy) or 1,10-phenanthroline (phen) gave the expected [M(Mes)(3,5-lut)(NN)][BF4] compounds and the unexpected [Ni(Mes){NHC(Me)(2,4,6-Me3C6H 2)}(NN)][BF4] complexes in the presence of TlBF 4 and 3,5-lutidine or acetonitrile. The sequence of reactions that leads to the imine ligand must include an initial insertion of the nitrile on the σ(Ni-Mes) bond. These ionic complexes remain stable under 20 bar of ethylene. The Royal Society of Chemistry.
