Chemical and spectroscopic evidence for an FeV-oxo complex

Filipe Tiago De Oliveira, Arani Chanda, Deboshri Banerjee, Xiaopeng Shan, Sujit Mondal, Lawrence Que, Emile L. Bominaar, Eckard Münck, Terrence J. Collins

Research output: Contribution to journalArticlepeer-review

335 Scopus citations

Abstract

Iron(V)-oxo species have been proposed as key reactive intermediates in the catalysis of oxygen-activating enzymes and synthetic catalysts. Here, we report the synthesis of [Fe(TAML)(O)]- in nearly quantitative yield, where TAML is a macrocyclic tetraamide ligand. Mass spectrometry, Mössbauer, electron paramagnetic resonance, and x-ray absorption spectroscopies, as well as reactivity studies and density functional theory calculations show that this long-lived (hours at -60°C) intermediate is a spin S = 1/2 iron(V)-oxo complex. Iron-TAML systems have proven to be efficient catalysts in the decomposition of numerous pollutants by hydrogen peroxide, and the species we characterized is a likely reactive intermediate in these reactions.

Original languageEnglish (US)
Pages (from-to)835-838
Number of pages4
JournalScience
Volume315
Issue number5813
DOIs
StatePublished - Feb 9 2007

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