Observation of Radical Rebound in a Mononuclear Nonheme Iron Model Complex

J Am Chem Soc. 2018 Mar 28;140(12):4191-4194. doi: 10.1021/jacs.7b12707. Epub 2018 Mar 14.

Abstract

A nonheme iron(III) terminal methoxide complex, [FeIII(N3PyO2Ph)(OCH3)]ClO4, was synthesized. Reaction of this complex with the triphenylmethyl radical (Ph3C) leads to formation of Ph3COCH3 and the one-electron-reduced iron(II) center, as seen by UV-vis, EPR, 1H NMR, and Mössbauer spectroscopy. These results indicate that homolytic Fe-O bond cleavage occurs together with C-O bond formation, providing a direct observation of the "radical rebound" process proposed for both biological and synthetic nonheme iron centers.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Ferric Compounds / chemical synthesis
  • Ferric Compounds / chemistry*
  • Free Radicals / chemistry
  • Models, Molecular
  • Molecular Conformation

Substances

  • Ferric Compounds
  • Free Radicals