Complexation of a Nickel(III) Macrocyclic Complex by Sulfate Ion. A Pulse Radiolytic Study
Document Type
Article
Date of Original Version
1-1-1979
Abstract
The kinetics of oxidation of Ni11[meso-Me6[14]aneN4] (NiL2+) to Ni(III) by OH radical and subsequent complexation by sulfate ion have been studied in acidic aqueous media at 22°C and μ=0.01-0.3 M by the pulse radiolytic technique. Results indicate that NiL3+hydrolyzes with a pK+3.7±0.2 but that, at least up to pH 5.2, substitution by SO42- occurs only on the unhydrolyzed species with a rate constant of 1X106 M-1 s-1 at μ=0.03 M. The equilibrium constant for sulfate complexation is 3.0X104 M-1 at μ=0.03 M and the product of the reaction is identical with the stable NiLSO4+species produced by the electrochemical oxidation of NiL2+in sulfate media. The results demonstrate the stabilization of NiIII by sulfate complexation. © 1979, American Chemical Society. All rights reserved.
Publication Title, e.g., Journal
Inorganic Chemistry
Volume
18
Issue
10
Citation/Publisher Attribution
Cohen, Haim, Dan Meyerstein, Dan Meyerstein, Louis J. Kirschenbaum, Esther Zeigerson, Moshe Jaacobi, Efrat Fuchs, Gregory Ginzburg, and Louis J. Kirschenbaum. "Complexation of a Nickel(III) Macrocyclic Complex by Sulfate Ion. A Pulse Radiolytic Study." Inorganic Chemistry 18, 10 (1979). doi: 10.1021/ic50200a026.
