Facile hydrogen atom transfer to iron(iii) imido radical complexes supported by a dianionic pentadentate ligand†,10.1039/C6SC01433J

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Facile hydrogen atom transfer to iron(iii) imido radical complexes supported by a dianionic pentadentate ligand†

Denis M. Spasyuk,Stephanie H. Carpenter,Christos E. Kefalidis,Warren E. Piers,Michael L. Neidig,Laurent Maron

Chemical Science Pub Date : 05/31/2016 00:00:00 , DOI:10.1039/C6SC01433J

Abstract

A dianionic tetrapodal pentadentate diborate ligand is introduced. This ligand forms a high spin neutral iron(II) complex that reacts with a variety of organoazides to yield transient Fe(III) imido radicals that are extremely potent hydrogen atom abstractors. The nature of these species is supported by full characterization of the Fe(III) amido products, kinetic studies, density functional computations and Mössbauer spectroscopy on the –C₆H₄-p-^tBu substituted derivative.