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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 13, Number 1
BKCSDE 13(1)
January 20, 1992 

Effects of Added Anions on the Reaction of Nitrous Acid with Hydrogen Peroxide
Jong-Yoon Park*, Eun Jin Choi, Joon Woo Park
The reactions of nitrous acid with hydrogen peroxide in acidic aqueous solution in the presence of several added anions have been studied at 0℃ and pH 2-4 to investigate the nucleophilic catalysis of these anions. From the dependence of reaction rates on the anion concentrations, significant catalytic effects were found for Cl-, Br-, SCN-, in order of effect SCN- ≒ Br- > Cl-, while no observable effect was found for ClO4- and NO3-. These results support O-nitrosation reaction is the rate-determining step and NOX formed in the presence of an anion (X-) also acts as a nitrosating agent and accelerates the overall reaction rate. The order of reactivity was found to be NOCl > NOBr > NOSCN, which is consistent with the results of N-nitrosation and S-nitrosation reactions.
37 - 41
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