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Vinylic and Ring-opening Metathesis Polymerization of Norbornene with Bis(β-ketoamine) Cobalt Complexes by Feng Bao; Xing-Qiang Lü; Haiyang Gao; Guoqiu Gui; Qing Wu is a Materials Science article available to read on EtoBox.

What is Vinylic and Ring-opening Metathesis Polymerization of Norbornene with Bis(β-ketoamine) Cobalt Complexes about?

## Abstract Cobalt complexes **1**–**4** bearing __N,O__‐chelate ligands based on condensation products of 1‐phenyl‐3‐methyl‐4‐benzoyl‐5‐pyrazolone with aniline, __o__‐methylaniline, α‐naphthylamine, and __p__‐nitroaniline, respectively, were synthesized, and the structures of **1** and **4** were characterized by single‐crystal X‐ray diffraction analyses. The bis(β‐ketoamine) cobalt complexes could act as moderately active catalyst precursors for norbornene polymerization with the activation of methylaluminoxane. This catalytic reaction proceeded mainly through a vinyl‐type polymerization mechanism. ^1^H NMR and IR showed that in all cases, a small amount of double bonds raised from ring‐opening metathesis polymerization (ROMP) was present in the polymerization products. The variation of the polymerization conditions affected the ROMP unit ratio in the polynorbornenes. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 5535–5544, 2005

Who reads Vinylic and Ring-opening Metathesis Polymerization of Norbornene with Bis(β-ketoamine) Cobalt Complexes?

Author

Feng Bao; Xing-Qiang Lü; Haiyang Gao; Guoqiu Gui; Qing Wu

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

2005

Language

EN

Field

Materials Science (Physical Sciences)