Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Jul 4;61(26):9997-10005.
doi: 10.1021/acs.inorgchem.2c00865. Epub 2022 Jun 16.

Metal-Metal-Bonded Fe4 Clusters with Slow Magnetic Relaxation

Phoebe R Hertler  1 , Linus Kautzsch  2 , Alexander J Touchton  1 , Guang Wu  1 , Trevor W Hayton  1
Affiliations
Free article

Metal-Metal-Bonded Fe4 Clusters with Slow Magnetic Relaxation

Phoebe R Hertler et al. Inorg Chem. .
Free article

Abstract

Reaction of FeBr2 with Li(N═CtBu2) (0.5 equiv) and Zn0 (2 equiv) results in the formation of the formally mixed-valent cluster [Fe4Br2(N═CtBu2)4] (1) in moderate yield. The subsequent reaction of 1 with Na(N═CtBu2) results in formation of [Fe4Br(N═CtBu2)5] (2), also in moderate yield. Both 1 and 2 were characterized by zero-field 57Fe Mössbauer spectroscopy, X-ray crystallography, and superconducting quantum interference device magnetometry. Their tetrahedral [Fe4]6+ cores feature short Fe-Fe interactions (ca. 2.50 Å). Additionally, both 1 and 2 display S = 7 ground states at room temperature and slow magnetic relaxation with zero-field relaxation barriers of Ueff = 14.7(4) and 15.6(7) cm-1, respectively. Moreover, AC magnetic susceptibility measurements were well modeled by assuming an Orbach relaxation process.

PubMed Disclaimer