ISSN:
1040-0397
Keywords:
Complexation
;
Manganese
;
Pyrithione
;
Mechanism
;
Polarography
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Polarograms of mixtures of MnII and the anion of 2-mercaptopyridine N-oxide (pyrithione) in neutral media do not show separate waves for the metal ion, either complexed or not, nor for the ligand, free or in the complex. The two-electron reduction of MnII is shown to be an ErEi process in the absence of ligand and CrErEi process in the presence of ligand, with a fast previous reaction. From measurements made at constant MnII concentration and variable ligand concentration it is shown that the 1:1 complex is formed. The logarithm of the formation constant of this complex is obtained from these and other measurements, this value being log Kf = 3.76 ± 0.03.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140090817
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