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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 39, Number 12
JKCSEZ 39(12)
December 20, 1995 

 
Title
Kinetics and Mechanism of Reaction of Hydrogen Peroxide with Copper (Ⅱ)-Schiff Base Complexes

구리 (Ⅱ)-시프염기 착물과 과산화수소의 반응속도 및 메카니즘
Author
Sun-Deuk Kim*, Mu-Su Joung, Gyoung-Rok Jin, Chang-Su Kim

김선덕*, 정무수, 진경록, 김창수
Keywords
Abstract
시료 염기 구리(Ⅱ) 착물에 의한 과산화수소 분해속도를 측정하였다. 과산화수소와 구리(Ⅱ)-시프염기 착물의 반응속도는 CuⅡBSDT 및 CuⅡBSTP인 경우 pH에 따라 증가하였으나 CuⅡBSTT의 경우 증가하였다가 감소하였다. 이 반응의 메카니즘은 과산화수소의 시프염기 구리(Ⅱ) 착물의 탈양성자를 거친 다음에 속도결정단계에서 퍼옥소 구리착물이 생성되는 반응과정과 일치한다.

Rates of the decomposition of hydrogen peroxide by copper(Ⅱ)-Schiff base complexes were measured at various concentrations of hydrogen peroxide. Decomposition rates of hydrogen peroxide increased with increasing pH for CuⅡBSDT and CuⅡBSTP but then decreased with the same variation of the pH for CuⅡBSTT. A possible mechanism in accord with experimental results was proposed. The mechanism involves the deprotonation of copper(Ⅱ)-Schiff base complexes of hydrogen peroxide, followed by the formation of peroxo complexes at the rate-determining step.

Page
932 - 939
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