The reaction of ONOO- with carbonyls: Estimation of the half-lives of ONOOC(O)O- and O2NOOC(O)O-

Sara Goldstein*, Johan Lind, Gabor Merényi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

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 O2 is unaffected by the presence of bicarbonate.

Original languageEnglish
Pages (from-to)808-810
Number of pages3
JournalDalton Transactions
Issue number5
DOIs
StatePublished - 2002

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