Sc3+-triggered oxoiron(IV) formation from O2 and its non-heme iron(II) precursor via a Sc3+-peroxo-Fe3+ intermediate

Feifei Li, Katherine M. Van Heuvelen, Katlyn K. Meier, Eckard Münck, Lawrence Que

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Abstract

We report that redox-inactive Sc3+ can trigger O2 activation by the FeII(TMC) center (TMC = tetramethylcyclam) to generate the corresponding oxoiron(IV) complex in the presence of BPh 4- as an electron donor. To model a possible intermediate in the above reaction, we generated an unprecedented Sc3+ adduct of [FeIII2-O2)(TMC)]+ by an alternative route, which was found to have an Fe3+-(μ- η22-peroxo)-Sc3+ core and to convert to the oxoiron(IV) complex. These results have important implications for the role a Lewis acid can play in facilitating O-O bond cleavage during the course of O2 activation at non-heme iron centers.

Original languageEnglish (US)
Pages (from-to)10198-10201
Number of pages4
JournalJournal of the American Chemical Society
Volume135
Issue number28
DOIs
StatePublished - Jul 17 2013

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