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Issue 42, 2009
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γ-Agostic interactions stabilize the propagating species in the vinyl addition polymerization of norbornene

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Abstract

Cationic [(tmeda)Pd(OEt2)(Me)][B(ArF)4] was synthesized by protonation of (tmeda)PdMe2 and allowed for the first time the nature of the propagating species in the vinyl addition polymerization of norbornene to be discerned. In this system γ-agostic interactions stabilize the propagating species and permit stepwise monomer insertions to be observed by 1H NMR spectroscopy. This and earlier studies provide a new proposal for the propagating species in ligand-less late transition metal-catalyzed norbornene polymerizations.

Graphical abstract: γ-Agostic interactions stabilize the propagating species in the vinyl addition polymerization of norbornene

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Publication details

The article was received on 10 Aug 2009, accepted on 03 Sep 2009 and first published on 28 Sep 2009


Article type: Communication
DOI: 10.1039/B916457J
Citation: Chem. Commun., 2009,0, 6361-6363
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    γ-Agostic interactions stabilize the propagating species in the vinyl addition polymerization of norbornene

    M. D. Walter, P. S. White and M. Brookhart, Chem. Commun., 2009, 0, 6361
    DOI: 10.1039/B916457J

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