Catalytic oxidation of N-methyldiphenylamine-4-sulfonic acid in weakly acid solutions: A study by radiospectroscopic methods

Authors
Gumenyuk, AP Mushtakova, SP
Citation
Ap. Gumenyuk et Sp. Mushtakova, Catalytic oxidation of N-methyldiphenylamine-4-sulfonic acid in weakly acid solutions: A study by radiospectroscopic methods, J ANALYT CH, 54(6), 1999, pp. 549-553
Citations number
11
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF ANALYTICAL CHEMISTRY
ISSN journal
10619348 → ACNP
Volume
54
Issue
6
Year of publication
1999
Pages
549 - 553
Database
ISI
SICI code
1061-9348(199906)54:6<549:COONAI>2.0.ZU;2-1
Abstract
The mechanism of the catalytic oxidation of N-methyldiphenylamine-4-sulfoni c acid (MDPASA) in weakly acid (10(-3) M H2SO4) solutions was studied by EP R and H-1 NMR spectroscopy. It is shown that the oxidation of the reagent w ith potassium periodate in the presence of Ru(IV) proceeds through a radica l mechanism that includes alternate steps of the oxidation and reduction of the catalyst. The suggested mechanism of the catalytic oxidation of MDPASA gave theoretical grounds to the conditions for the determination of ruthen ium and iridium by kinetic methods that were selected previously on the bas is of experimental data.