<I>P</I>-クレゾールの酸化カップリング反応における自動的反応阻害要因とその除去

DOI Web Site Web Site 参考文献15件

書誌事項

タイトル別名
  • Auto-Inhibitory Factors of <I>p</I>-Cresol Oxidative Coupling and Their Elimination
  • Auto-Inhibitory Factors of p-Cresol Oxidative Coupling and Their Elimination

この論文をさがす

抄録

Following the addition of p-cresol (1) to aqueous solution of ferric chloride (FeCl3), direct-liked oligomers of 1 were produced by oxidative coupling. HCl and FeCl2, were produced during the course of the reactions, which was shown to be auto-inhibitory, in that the synergistic effect of these compounds greatly inhibited oxidation. HCl appeared to prevent the coordination of 1 with oligomers to Fe3+. FeCl2 may possibly function as an competitive inhibitor by complexing with 1 and oligomers. These auto-inhibitory factors were tried to eliminate through the addition of ammonia, ethylenediamine, and pyridine. The mechanism for this elimination through ammonium salt formation is unclear though interactions with metal ions could be clearly explained based on the experimental results. Ammonia and ethylenediamine, hard bases according to the law of hard and soft ligands and metal ions, prevented oxidation. These compounds appeared strongly coordinate with Fe3+ (hard metal ion and oxidizing reagent) to inhibit the oxidation. Pyridine, an intermediate base, promoted the conversion of 1 to oligomers by forming a stable complex with Fe2+ (intermediate metal ion and the competitive inhibitor of the reaction).

収録刊行物

  • 日本油化学会誌

    日本油化学会誌 48 (2), 117-121,149, 1999

    公益社団法人 日本油化学会

参考文献 (15)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ