KINETIC-STUDIES OF THE AQUOPENTAAMMINECOBALT(III)/HYDROGEN AND AQUOPENTAAMMINECHROMIUM(III)/HYDROGEN CHROMATE COMPLEXATION REACTION

被引：10

作者：

GRACE, MR

TREGLOAN, PA

机构：

[1] Chemistry Department, University of Calgary, Alberta, Calgary

[2] Inorganic Chemistry Section, School of Chemistry, University of Melbourne, Parkville

来源：

INORGANIC CHEMISTRY | 1992年 / 31卷 / 22期

关键词：

D O I：

10.1021/ic00048a016

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The kinetics of the complexation reaction between M(NH3)5OH23+ (M = Co, Cr) and HCrO4- have been determined by stopped-flow measurements in acidic aqueous solution (mu = 0.50 M). A new mechanism is proposed to account for the nonlinear acid dependence of the reaction rate at low pH. Aquation of the complex occurs almost exclusively via the protonated species, M(NH3)5HCrO42+. Activation parameters for the Cr(III) complexation with HCrO4-have been measured and are discussed in relation to other oxo anion substitution reactions.

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页码：4524 / 4529

页数：6

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