Dinitrogen Coordination to a High-Spin Diiron(I/II) Species.

ABSTRACT: Dinitrogen coordination to iron centers underpins industrial and biological fixation in the Haber-Bosch process and by the FeM cofactors in the nitrogenase enzymes. The latter employ local high-spin metal centers; however, iron-dinitrogen coordination chemistry remains dominated by low-valent states, contrasting the enzyme systems. Here, we report a high-spin mixed-valent cis-(μ-1,2-dinitrogen)diiron(I/II) complex [(FeBr)₂ (μ-N₂ )L^bis ]^- (2), where [L^bis ]^- is a bis(β-diketiminate) cyclophane. Field-applied Mössbauer spectra, dc and ac magnetic susceptibility measurements, and computational methods support a delocalized S=⁷ /₂ Fe₂ N₂ unit with D=-5.23 cm^-1 and consequent

SUBMITTER: Torres JF 

PROVIDER: S-EPMC9117494 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature