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Characterization of Mononuclear Non‐heme Iron(III)‐Superoxo Complex with a Five‐Azole Ligand Set
Author(s) -
Oddon Frédéric,
Chiba Yosuke,
Nakazawa Jun,
Ohta Takehiro,
Ogura Takashi,
Hikichi Shiro
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201502367
Subject(s) - chemistry , raman spectroscopy , electron paramagnetic resonance , photochemistry , adduct , ligand (biochemistry) , resonance raman spectroscopy , resonance (particle physics) , heme , nuclear magnetic resonance , organic chemistry , atomic physics , biochemistry , physics , receptor , optics , enzyme
Reaction of O 2 with a high‐spin mononuclear iron(II) complex supported by a five‐azole donor set yields the corresponding mononuclear non‐heme iron(III)–superoxo species, which was characterized by UV/Vis spectroscopy and resonance Raman spectroscopy. 1 H NMR analysis reveals diamagnetic nature of the superoxo complex arising from antiferromagnetic coupling between the spins on the low‐spin iron(III) and superoxide. This superoxo species reacts with H‐atom donating reagents to give a low‐spin iron(III)–hydroperoxo species showing characteristic UV/Vis, resonance Raman, and EPR spectra.