SPECTROSCOPIC STUDY ON THE ELEMENTARY REACTIONS OF OXIDATIVE POLYMERIZATION.

Eishun Tsuchida*, Hiroyuki Nishide, Hiroshi Nishikawa

*この研究の対応する著者

研究成果: Chapter

13 被引用数 (Scopus)

抄録

In the reported study the catalytic cycle of the Cu-pyridine complex catalyzed polymerization of 2,6-xylenol was divided into four elementary processes: the coordination of the substrate, the electron transfer from the substrate to the cupric ion, the dissociation of the activated substrate, and the reoxidation of the catalyst. Rate constants of each elementary reaction, k//1, k//e, k//d, and k//o, were determined spectroscopically by the stopped-flow method. The approximate magnitudes of each rate constant were k//1:10(1 multiplied by (times) mole** minus **1 multiplied by (times) min** minus **1), k//e:10** minus **2(min** minus **1), and k//o:10**2(min** minus **1), respectively. Thus, it was considered that the k//e or the k//d process was the rate-determining step, but the latter could not be measured in this procedure. The rate constants were affected by the species of the solvent. With a few exceptions of the solvent which had coordinating ability, k//1 and k//e increased and k//o decreased with the polarity of the solvent. The effects of the polymer-ligand on each elementary reaction were also studied in the polymerization catalyzed by the Cu-partially-quaternized poly(vinylpyridine) complex.

本文言語English
ホスト出版物のタイトルJ Polym Sci Part C, Polym Symp
ページ47-54
ページ数8
47
出版ステータスPublished - 1974
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)

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