Novel Low-Spin Hydroperoxoiron(III) Species

  • Author: Chemistry – A European Journal
  • Published Date: 01 February 2018
  • Source / Publisher: Chemistry – A European Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Novel Low-Spin Hydroperoxoiron(III) Species

Related Societies

Iron-peroxo species are formed along the catalytic cycle of nonheme iron proteins involved in oxidative processes. An intense debate exists on whether such species are directly responsible for the reactivity or are merely a precursor of a metal-oxo reactive species.

Manuel G. Basallote, Universidad de Cádiz, Spain, Josep M. Luis, Miquel Costas, and Anna Company, Universitat de Girona, Spain, Lawrence Que Jr., University of Minnesota, Minneapolis, USA, and colleagues have characterized a novel iron(III)-hydroperoxo species with a nitrogen-based tetradentate ligand, [FeIII(OOH)(MeCN)(PyNMe3)]2+. This compound was generated by the reaction of its ferrous precursor [FeII(CF3SO3)2(PyNMe3)] with hydrogen peroxide at low temperatures.

The iron(III)-hydroperoxo species itself cannot be used for the oxidation of C–H bonds. However, the addition of triflic acid causes an enhancement in its reactivity and allows the stereospecific oxidation of unactivated C–H bonds. Stopped-flow analysis and reactivity studies, together with density functional theory (DFT) calculations, suggest that a high valent metal-oxo species is formed upon protonation and heterolytic cleavage of the O–O bond (pictured).

Interestingly, in the heme enzyme cytochrome P450, the protonation of a peroxo moiety precedes the generation of the reactive high-valent iron-oxo species. Thus, this work suggests that a similar stepwise process can take place in nonheme systems.


Article Views: 1519

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

CONNECT: on Facebook on Twitter on YouTube on LinkedIn Sign up for our free newsletter

Magazine of Chemistry Europe (16 European Chemical Societies)published by Wiley-VCH