A Five-Coordinate Phosphino/Acetate Iron(II) Scaffold That Binds N₂, N₂H₂, N₂H₄, and NH₃ in the Sixth Site

Abstract

A family of iron(II) complexes that coordinate dinitrogen, diazene, hydrazine, and ammonia are presented. This series of complexes is unusual in that the complexes within it feature a common auxiliary ligand set and differ only by virtue of the nitrogenous N_xH_y ligand that occupies the sixth binding site. The ability of an iron center to bind N₂, N₂H₂, N₂H₄, and NH₃ is important to establish in the context of evaluating catalytic N₂ reduction schemes that invoke these nitrogenous species. Such a scenario has been proposed as an iron-mediated, alternating reduction scheme within the cofactor of nitrogenase enzymes.

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