"ATRP of Methacrylates Catalysed by Homo- and Heterobimetallic Ruthenium Complexes"

Albert Demonceau, Yannick Borguet, Xavier Sauvage, Dario Bicchielli, Sébastien Delfosse, Lionel Delaude, Laurianne Bareille, Pierre Le Gendre, and Claude Moïse

book cover 
           title: Controlled/Living Radical Polymerization: Progress in ATRP
          series: ACS Symposium Series
          editor: Krysztof Matyjaszewski
       publisher: American Chemical Society
            city: Washington, DC
            year: 2009
          volume: 1023
      first page: 97
       last page: 114
            isbn: 978-0-8412-6995-8 (Print) 978-0-8412-2509-1 (Online)
             doi: 10.1021/bk-2009-1023.ch007

Abstract: The catalytic activity of a series of ruthenium-based homo- and heterobimetallic complexes was determined by investigating the atom transfer radical polymerisation of methyl methacrylate. The complexes under investigation were [(arene)Ru(μ-Cl)3RuCl(C2H4)(L)] (L = PCy3 or a N-heterocyclic carbene ligand), [(p-cymene)Ru(μ-Cl)3RuCl(=C=CHR)(PCy3)] (R = Ph or t-Bu), and [RuCl2(p-cymene){PCy2(CH2)2(η5-C5H4)TiX2(η5-C5H5)}] (X = Cl, F, and OBz). The catalytic activity of a variety of related [(p-cymene)ClRu(μ-Cl)2Ru(O^N)(=CHPh)] complexes (O^N is a Schiff base ligand) is also reported. The results clearly demonstrate that the ligands strongly affect the ability of the resulting ruthenium complexes to favour the occurrence of a well-behaved ATRP.

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