Characteristic mechanisms of the homogeneous and heterogeneous oxidation of aromatic amines with transition metal-oxalate complexes

A. B. Zaki, M. Y. El-Sheikh, J. Evans*, S. A. El-Safty

*この研究の対応する著者

研究成果: Article査読

40 被引用数 (Scopus)

抄録

The oxidation-reduction reactions of aromatic amines {o-aminophenol (o-AP), o-phenylenediamine (o-PDA) and p-phenylenediamine (p-PDA)} with Co(III)-, Mn(III)-, and Cu(II)-oxalate complexes have been investigated in homogeneous and heterogeneous systems. The kinetics of the redox reaction of both systems have been studied spectrophotometrically. The redox products were identified and characterised by diffuse reflectance spectroscopy (DRS), and mass spectrometry. The redox reactions follow first-order kinetics with respect to each of the reactants and first order in [amines] in homogeneous and heterogeneous (supported complexes on Amberlite IRA 904 anion-exchange resin) phases, respectively. However, the specific oxidation rate of the amines is found to follow the order, p-PDA > o-AP > o-PDA. The effect of the oxalate anion on the reaction rate of both systems was examined. There is a significant difference in the behaviour of the oxidation of o-AP and o-, p-PDA with all the metal complexes in both systems. Moreover, the oxidation of o-AP and o-, p-PDA appears to follow the outer- and inner-sphere mechanistic classification, respectively. (C) 2000 Elsevier Science Ltd.

本文言語English
ページ(範囲)1317-1328
ページ数12
ジャーナルPolyhedron
19
11
DOI
出版ステータスPublished - 2000 6月 15
外部発表はい

ASJC Scopus subject areas

  • 生化学
  • 無機化学
  • 物理化学および理論化学
  • 材料化学

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