Linear free energy  relationships between reaction rate constants and equilibrium constants of complex compounds II: Binary complex formation kinetics of N-(p-substituted phenyl) glycines with nickel (II)

Acta Chimica Sinica ›› 1988, Vol. 46 ›› Issue (8): 751-756. Previous Articles Next Articles

Original Articles

配合物生成反应速率常数与平衡常数之间的直线自由能关系 II: 镍(II)-N-(对位取代苯基)氨基乙酸配合物的生成反应动力学研究

陈荣悌;张启衍;李跃进

南开大学化学系

发布日期:1988-08-15

Linear free energy relationships between reaction rate constants and equilibrium constants of complex compounds II: Binary complex formation kinetics of N-(p-substituted phenyl) glycines with nickel (II)

CHEN RONGTI;ZHANG QIYAN;LI YUEJIN

Published:1988-08-15

Abstract

The kinetics of the complexation reaction of some N-(p-substituted phenyl) glycines with Ni(II) at 25?and ionic strength 0.1 mol/dm3 in 30% (v) ethanol solution was studied by means of stopped-flow method. The experimental results showed that not only the ligand anion but also the zwitterion is an attacking species in the complexation reaction. The reaction takes place by way of 2 competing paths, one is the anion path which proceeds according to the Eigen-Tamm mechanism and another one is the zwitterion by which the rate-detg. step involves proton transfer. The reactivity of the zwitterions increased with decreasing basicity of the ligands. A linear free-energy relationship holds for all the reactions studied. Some linear free-energy relationships also exist between the dissociation rate constants and the basicity of the ligands and the stability constants of the binary complexes as well.

Key words: BENZAMINE P, REACTION KINETICS, STABILITY CONSTANT, EQUILIBRIUM CONSTANT, NICKEL COMPLEX, GLYCINE, REACTION RATE, LINEAR FREE ENERGY RELATIONSHIP

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CHEN RONGTI;ZHANG QIYAN;LI YUEJIN. Linear free energy relationships between reaction rate constants and equilibrium constants of complex compounds II: Binary complex formation kinetics of N-(p-substituted phenyl) glycines with nickel (II)[J]. Acta Chimica Sinica, 1988, 46(8): 751-756.

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配合物生成反应速率常数与平衡常数之间的直线自由能关系 II: 镍(II)-N-(对位取代苯基)氨基乙酸配合物的生成反应动力学研究

Linear free energy relationships between reaction rate constants and equilibrium constants of complex compounds II: Binary complex formation kinetics of N-(p-substituted phenyl) glycines with nickel (II)

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