DOES ANION-CATALYZED GROUP-TRANSFER POLYMERIZATION PROCEED VIA AN ENOLATE INTERMEDIATE

Authors
WEBSTER OW
Citation
Ow. Webster, DOES ANION-CATALYZED GROUP-TRANSFER POLYMERIZATION PROCEED VIA AN ENOLATE INTERMEDIATE, Journal of macromolecular science. Pure and applied chemistry, A31(8), 1994, pp. 927-935
Citations number
12
Categorie Soggetti
Polymer Sciences
Journal title
Journal of macromolecular science. Pure and applied chemistry → ACNP
ISSN journal
10601325
Volume
A31
Issue
8
Year of publication
1994
Pages
927 - 935
Database
ISI
SICI code
1060-1325(1994)A31:8<927:DAGPPV>2.0.ZU;2-7
Abstract
Group-transfer polymerization of methyl methacrylate was originally po stulated to occur by an associate process wherein an activated trimeth ylsilyl group transferred to incoming monomer. The mechanism was based on double-labeling experiments. However, data published since this or iginal work point to a dissociative process wherein the catalyst gener ates a small amount of enolate that is in rapid exchange with the main pool of silyl-ketene-acetal-ended chains. The monomer adds to this ba re enolate.