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Well-Defined Aryl-Fe Complexes in Cross-Coupling and C-H Activation Processes. | LitMetric
Herein we explore the intrinsic organometallic reactivity of iron embedded in a tetradentate NC macrocyclic ligand scaffold that allows the stabilization of aryl-Fe species, which are key intermediates in Fe-catalyzed cross-coupling and C-H functionalization processes. This study covers C-H activation reactions using and FeCl, biaryl C-C coupling product formation through reaction with Grignard reagents, and cross-coupling reactions using or in combination with Fe(CO). Synthesis under light irradiation and moderate heating (50 °C) affords the aryl-Fe complexes [Fe(Br)( )(CO)] ( ) and [Fe( )(CO)]Br ( ). Exhaustive spectroscopic characterization of these rare low-spin diamagnetic species, including their crystal structures, allowed the investigation of their intrinsic reactivity.
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