Untitled

Gupta, K. C.; Bhargava, Pinky; Manoj, Sreedharan V.

doi:10.1023/a:1007067115356

Cited by 5 publications

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates that any proposed mechanism is likely to involve the coordination of two SO 2− 3 ions with Cu(II) and this species, Cu(NH 3 ) n (SO 3 ) 2− 2 (n = 1-3), appears to be common to both O 2 -dependent and O 2 -independent pathways. The spectrophotometric evidence for the formation of ternary Cu(II)-NH 3 -S(IV) complex [53] has been provided earlier.…”

Section: Analysis Of Rate Constants On the Basis Of Speciationmentioning

confidence: 94%

Kinetics of copper(II)‐catalyzed oxidation of S(IV) by atmospheric oxygen in ammonia buffered solutions

Sharma

Singh

Mehta

et al. 2011

Int J of Chemical Kinetics

View full text Add to dashboard Cite

To understand the chemistry of Cu(II)-NH 3 -S(IV)-O 2 system, the kinetics of the oxidation of sulfur(IV) catalyzed by amminecopper(II) complexes has been studied in the ammonia-buffered solutions. Sulfur(IV) is oxidized to sulfate. The complexes, Cu(NH 3 ) 2+ , Cu(NH 3 ) 2+ 2 , and Cu(NH 3 ) 2+ 3 appear to be equally reactive and Cu(NH 3 ) 2+ 4 appears to be unreactive. The kinetics obey the rate law: 2+ 3 complexes, which appear to be equally reactive. The values of α 1 and γ 1 were found to be (1.32 ± 0.21) × 10 6 L 2 mol −2 s −1 (1.74 ± 0.40) × 10 9 L 3 mol −3 s −1 respectively at 30 • C. The reaction rate is not influenced by the presence of ethanol-a free radical scavenger, so a nonradical mechanism has been proposed. The results of this study are useful in understanding the atmospheric chemistry of aqueous phase autoxidation of dissolved sulfur dioxide in copper(II)-ammonia-sulfur(IV)-oxygen system at high pH. C

show abstract

Section: Analysis Of Rate Constants On the Basis Of Speciationmentioning

confidence: 94%