Opening up the Valence Shell: A T‐Shaped Iron(I) Metalloradical and Its Potential for Atom Abstraction

A thermally stable, T‐shaped, d7 high‐spin iron(I) complex was obtained by reduction of a PNP‐supported ferrous chloride. Paramagnetic NMR spectroscopy combined with DFT modeling was used to analyze the electronic structure of the coordinatively highly unsaturated complex. The metalloradical character of the compound was demonstrated by the formation of a benzophenone ketyl radical complex upon addition of benzophenone. Furthermore, the compound displays a rich chemistry as an oxygen‐atom or from epoxides, yielding a dinuclear, diferrous [Fe2O] complex. Radicalized: A thermally stable, T‐shaped, high‐spin iron(I) PNP complex displayed remarkable reactivity towards oxygen‐containing functional groups, allowing the isolation of a stable iron ketyl radical complex and a bridged, diferrous oxido complex.