Issue 42, 2009

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

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

Supplementary files

Article information

Article type
Communication
Submitted
10 8 2009
Accepted
03 9 2009
First published
28 9 2009

Chem. Commun., 2009, 6361-6363

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, 6361 DOI: 10.1039/B916457J

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