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The reaction of ONOO- with carbonyls: Estimation of the half-lives of ONOOC(O)O- and O2NOOC(O)O
KTH, Superseded Departments, Chemistry.
KTH, Superseded Departments, Chemistry.
2002 (English)In: Journal of the Chemical Society. Dalton Transactions, ISSN 1472-7773, E-ISSN 1364-5447, no 5, 808-810 p.Article in journal (Refereed) Published
Abstract [en]

The equilibrium constant for the formation of an adduct between a carbonyl and a hydroperoxide ion varies linearly with the acid dissociation constant of the hydroperoxide. Based on this relationship, the half-life of the adduct formed between ONOO- and CO2, ONOOC(O)O-, is estimated to be shorter than 100 ns. Consequently, this adduct should not play any role whatsoever in chemical or biological systems. O2NOO- and CO2 are believed to be involved in a fast equilibrium reaction forming an adduct, O2NOOC(O)O-. This adduct does not appear to homolyse either along the O-O or the N-O bond. Furthermore, at realistic CO2 concentrations, the equilibrium should be shifted far to the O2NOO- + CO2 side. Therefore, the rate of self-decomposition of O2NOO- into NO2- and O-2 is unaffected by the presence of bicarbonate.

Place, publisher, year, edition, pages
2002. no 5, 808-810 p.
Keyword [en]
biological-activity, peroxynitrous acid, radical production, pulse-radiolysis, dioxide, mechanism, oxidation, decay, decomposition, bicarbonate
Identifiers
URN: urn:nbn:se:kth:diva-21427ISI: 000174708400022OAI: oai:DiVA.org:kth-21427DiVA: diva2:340125
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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