"Visible Light Induced Ring-Opening Metathesis Polymerization of Cyclic Olefins"

Anna Maj, Lionel Delaude, Albert Demonceau, and Alfred F. Noels

journal cover 
          source: e-Polymers
            year: 2003
          number: P_018
             doi: not available

Abstract: Stable nucleophilic N-heterocyclic carbenes (NHCs) are neutral, two-electron ligands with a negligible pi-back-bonding tendency. They behave as phosphine mimics, yet they are better sigma-donors and they form stronger bonds to metal centers than most phosphines. Their electronic and steric properties are liable to ample modification simply by varying the substituents on the nitrogen atoms. Therefore, NHCs constitute a promising new class of ligands available for catalyst engineering and fine-tuning. In this communication, we report on the synthesis of new ruthenium-arene complexes bearing NHC ligands - either preformed or generated in situ - and their use to promote the ring-opening metathesis polymerization (ROMP) of cyclooctene, a typical low-strain cyclic olefin.

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