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- W4296962109 abstract "Nitrene transfer reactions have emerged as one of the most powerful and versatile ways to insert an amine function to various kinds of hydrocarbon substrates. However, the mechanisms of nitrene generation have not been studied in depth albeit their formation is taken for granted in most cases without definitive evidence of their occurrence. In the present work, we compare the generation of tosylimido iron species and NTs transfer from FeII and FeIII precursors where the metal is embedded in a tetracarbene macrocycle. Catalytic nitrene transfer to reference substrates (thioanisole, styrene, ethylbenzene and cyclohexane) revealed that the same active species was at play, irrespective of the ferrous versus ferric nature of the precursor. Through combination of spectroscopic (UV-visible, Mössbauer), ESI-MS and DFT studies, an FeIV tosylimido species was identified as the catalytically active species and was characterized spectroscopically and computationally. Whereas its formation from the FeII precursor was expected by a two-electron oxidative addition, its formation from an FeIII precursor was unprecedented. Thanks to a combination of spectroscopic (UV-visible, EPR, Hyscore and Mössbauer), ESI-MS and DFT studies, we found that, when starting from the FeIII precursor, an FeIII tosyliodinane adduct was formed and decomposed into an FeV tosylimido species which generated the catalytically active FeIV tosylimide through a comproportionation process with the FeIII precursor." @default.
- W4296962109 created "2022-09-25" @default.
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- W4296962109 date "2022-10-27" @default.
- W4296962109 modified "2023-10-18" @default.
- W4296962109 title "Catalytic Nitrene Transfer by an Fe <sup>IV</sup> ‐Imido Complex Generated by a Comproportionation Process" @default.
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- W4296962109 doi "https://doi.org/10.1002/chem.202201875" @default.
- W4296962109 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36129399" @default.
- W4296962109 hasPublicationYear "2022" @default.