Isolation and characterization of a high-spin mixed-valent iron dinitrogen complex

McWilliams, Sean F.; Bunting, Philip C.; Kathiresan, Venkatesan; Mercado, Brandon Q.; Hoffman, Brian M.; Long, Jeffrey R.; Holland, Patrick L.

doi:10.1039/c8cc07294a

Title: Isolation and characterization of a high-spin mixed-valent iron dinitrogen complex

Journal Article · 06 November 2018 · ChemComm

DOI: https://doi.org/10.1039/c8cc07294a · OSTI ID:1974747

McWilliams, Sean F. ^[1];

^[2]; Kathiresan, Venkatesan ^[3]; Mercado, Brandon Q. ^[1];

^[3];

^[2];

^[1]

Yale Univ., New Haven, CT (United States)
Univ. of California, Berkeley, CA (United States)
Northwestern Univ., Evanston, IL (United States)

Here, we report a rare example of a mixed-valence iron compound with an FeNNFe core, which gives insight into the structural, spectroscopic, and magnetic influences of single-electron reductions and oxidations. In the new compound, the odd electron is localized as judged from Mössbauer spectra at 80 K and infrared spectra at room temperature, and the backbonding into the N₂ unit is intermediate between diiron(I) and diiron(0) congeners. Magnetic susceptibility and relaxation studies on the series of FeNNFe compounds show significant magnetic anisotropy, but through-barrier pathways enable fairly rapid magnetic relaxation.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: National Institutes of Health (NIH); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1974747

Journal Information:: ChemComm, Journal Name: ChemComm Journal Issue: 95 Vol. 54; ISSN 1359-7345

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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