Spin state tuning of non-heme iron-catalyzed hydrocarbon oxidations: Participation of FeIII-OOH and FeV=O intermediates

Kui Chen, Miquel Costas, Lawrence Que

Research output: Contribution to journalArticlepeer-review

157 Scopus citations

Abstract

We have found a family of non-heme iron complexes [FeII(L)(CH3CN)2](L = tetradentate pyridine containing ligand) with cis labile sites that catalyze highly stereo-selective hydrocarbon oxidations using H2O2 as oxidant. The hydrocarbon oxidation reactivity patterns of this family of catalysts divide them into two subgroups: Category A catalysts which carry out highly stereoselective alkane hydroxylation, olefin epoxidation, and olefincis-dihydroxylationvia low-spin FeIII-OOH, FeV=O intermediates and category B catalysts which form high-spin FeIII-OOH intermediates and strongly favor olefin cis-dihydroxylation in (which both diol oxygen atoms derive from H2O2. 6-Methyl substituents on the ligands play an important role in tuning the spin states of the iron centers to afford a family of non-heme iron complexes that catalyze a remarkable array of hydrocarbon oxidation reactions.

Original languageEnglish (US)
Pages (from-to)672-679
Number of pages8
JournalJournal of the Chemical Society, Dalton Transactions
Issue number5
StatePublished - 2002

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