Synthesis, structure, and polymerization activity of cyclopentadienylnickel(II) N-heterocyclic carbene complexes: Selective cross-metathesis in metal coordination spheres
The N-heterocyclic carbene (NHC) complexes [(RC5H 4)Ni(X)(NHC)] (2-5) have been prepared by treating nickelocene [or 1, 1′-bis(alkenyl)nickelocene] with a suitable carbene precursor. The alkenylcyclopentadienido complexes 4 and 5 und
Buchowicz, Wldzimierz,Wojtczak, Wioleta,Pietrzykowski, Antoni,Lupa, Anna,Jerzykiewicz, Lucjan B.,Makal, Anna,Wozniak, Krzysztof
N,N′-dialkyl- and N-aIkyl-N-mesityl-substituted N-heterocyclic carbenes as ligands in Grubbs catalysts
Various symmetrically and asymmetrically substituted N-heterocyclic carbene (NHC) ligands bearing aliphatic nitrogen-containing side groups have been synthesised. In our attempts to isolate the corresponding second-generation Grubbs catalysts, we were unsuccessful when using the symmetrical aliphatic NHC ligands. For the asymmetrical ligands bearing an aliphatic moiety on one side and an aromatic mesityl group on the other side, substitution of a phosphine ligand was achieved. The performance of a soformed series of Ru-based metathesis initiators has been evaluated for the ring-opening metathesis polymerisation (ROMP) of cycloocta-1,5-diene and the ring-dosing metathesis (RCM) of diethyl diallylmalonate.
Ledoux, Nele,Allaert, Bart,Pattyn, Siegfried,Mierde, Hans Vander,Vercaemst, Carl,Verpoort, Francis
p. 4654 - 4661
(2008/02/08)
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