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Study of the propagation centre in the anionic polymerization of lactams, 2. Model study of the interaction between an activated monomer and N-acyllactam in dimethyl sulfoxide

✍ Scribed by Jaroslav Kříž; Jaroslav Stehlíček; Jiří Dybal; Jan Hauer

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
566 KB
Volume
197
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Interaction of potassium 3,3‐dimethyl‐2‐piperidone with 1‐benzoyl‐3,3‐dimethyl‐2‐piperidone in DMSO as a model of the complex propagation centre in the anionic polymerization of lactams has been studied by ^1^H and ^13^C NMR, infrared spectroscopy, and, for the Li counterion, by MNDO calculations. The reactants were found to form a loose complex which can emerge in various geometries sharing the equivalence and relative motional freedom of both lactam moieties. Types of internal motions in the complex are suggested and their implications for the detailed idea of the propagation mechanism are discussed.

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