Kinetics of oxidation of nickel(II) aza macrocycles by peroxydisulphate inaqueous media

Authors
Lalitham, J Vijayaraghavan, VR
Citation
J. Lalitham et Vr. Vijayaraghavan, Kinetics of oxidation of nickel(II) aza macrocycles by peroxydisulphate inaqueous media, P I A S-CH, 112(5), 2000, pp. 507-514
Citations number
37
Categorie Soggetti
Chemistry
Journal title
PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-CHEMICAL SCIENCES
ISSN journal
02534134 → ACNP
Volume
112
Issue
5
Year of publication
2000
Pages
507 - 514
Database
ISI
SICI code
0253-4134(200010)112:5<507:KOOONA>2.0.ZU;2-B
Abstract
The kinetics of the oxidation of nickel (II) hexaaza and nickel (II) pentaa za macrocycles by the peroxydisulphate anion, S2O82-, were studied in aqueo us media. Effect of pH on reaction rate was also studied. The rate increase s with increase of S2O82- concentration. Rates are almost independent of ac id between pH 4 and 2, giving overall a relatively simple second-order rate law followed by oxidation within the ion pair solvent shell. Using rate = +1/2 d[Ni(L)3(+)]/dt=k[Ni(L)(2+)][S2O82-], oxidation rate constants were de termined.