Complexation of Pendant Arm Macrocycles with Cu(II) Hydroxo Complexes in Strongly Alkaline Solutions. Investigation of pH Dependences
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Peter G. Lye
Abstract
The complexation kinetics of fully deprotonated pendent arm macrocyclic ligands with Cu(II) hydroxo species had been investigated in aqueous solution at high pH. The pH dependence of the initial second order reaction is explained by the different reactivities for the tris- and tetra-hydroxo species of Cu(II). In some instances, the pendent arms accelerate the rates of the complex formation reaction. An intermediate complex is observed which reacts in a first order reaction to the final complex. The pH dependence of this reaction is the result of the existence of different numbers of aquo and hydroxo ligands additionally coordinated to the metal. Spectral changes for this second step are small, suggesting an isomerisation reaction is taking place.
© 2014 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Tribute
- Kinetics of Dissociation of the Cobalt(II) and Copper(II) Complexes of 2,2′,2″-tris(monomethylamino)triethylamine in Aqueous Acidic Solution
- The Influence of Steric Effects on the Oxidation Kinetics of [FeII(aminopolycarboxylato)] Complexes with Dioxygen
- The Hydrolysis Kinetics of ds-diamminedichloroplatinum(II). 10. Activation Volumes for Halide Anation of Some czs-[Pt(N)2(OH2)2]2+ Systems
- The Dependence of the Copper Dissociation Rate Constants from Human(Serum)- and Ονο-Transferrin on pH and the Anions
- Kinetics of the Photosubstitution of ds-Bis(benzonitrile)dichloroplatinum(II) in Chloroform
- Kinetics and Mechanisms of the Reaction of Aluminium(III) with Polyaminocarboxylic Acids
- Kinetics and Mechanism of Oxidation of Tellurium(IV) by Alkaline Diperiodatonickelate(IV)
- Complexation of Pendant Arm Macrocycles with Cu(II) Hydroxo Complexes in Strongly Alkaline Solutions. Investigation of pH Dependences
- Kinetics and Mechanism of the Chromium(VI) Oxidation of Formic Acid in the Presence of Picolinic Acid and in the Presence and Absence of Surfactants
- Kinetics and Mechanism of Chromium(III) Catalysed Oxidation of Propan-1-ol and Butan-1-ol by Cerium(IV) in Aqueous Sulfuric acid Media
- Notes for Contributors. Inorganic Reaction Mechanisms
- Journal Order Form
