Kinetics of diamminesilver(I)-catalysed oxidation of sulphur(IV) by dioxygen in ammonia buffers

Authors
Gupta, KS Bhargava, P Manoj, SV
Citation
Ks. Gupta et al., Kinetics of diamminesilver(I)-catalysed oxidation of sulphur(IV) by dioxygen in ammonia buffers, TRANSIT MET, 26(1-2), 2001, pp. 71-75
Citations number
31
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
TRANSITION METAL CHEMISTRY
ISSN journal
03404285 → ACNP
Volume
26
Issue
1-2
Year of publication
2001
Pages
71 - 75
Database
ISI
SICI code
0340-4285(200102)26:1-2<71:KODOOS>2.0.ZU;2-4
Abstract
The kinetics of the silver(I)-catalysed autoxidation of SO32- into SO42- in ammonia-ammonium nitrate buffer obeyed the rate law: R-obs = k(1)k(2)K[Ag-I](T)[SO32-][O-2]/([NH3]+K[SO32-])(k(-1)+k(2)[O-2]) The values of k(1), k(2)/k(-1) and K were found to be 1.2 l mol(-1) s(-1), 5.3 x 10(2) l mol(-1) and 0.6 respectively at 30 degreesC. Two alternative free radical mechanisms have been proposed.