title: Rapid cross-disproportionation between superoxometal ions and acylperoxyl radicals.
abstract: A superoxochromium complex Cr(aq)OO(2+) reacts with acetylperoxyl radicals, CH(3)C(O)OO(*), with a rate constant of 1.49 x 10(8) M(-1) s(-1). The kinetics were determined by laser flash photolysis, using an organocobalt complex as a radical precursor and ABTS(*-) as a kinetic probe. The initial step is believed to involve radical coupling at the remote oxygen of Cr(aq)OO(2+), followed by elimination of O(2) and formation of CH(3)COOH and Cr(V)(aq)O(3+). The latter disproportionates and ultimately yields Cr(aq)(3+) and HCrO(4)(-).
authors.affiliation: Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA. bakac@ameslab.gov
authors.forename: Andreja
authors.initials: A
authors.lastname: Bakac