Isolation of an Americium Complex Containing a Radical Ligand
The synthesis, characterization, and electronic structure of Cp*<sub>2</sub>Am(<sup><i>t</i></sup>Bu<sub>2</sub>bipy<sup>•-</sup>) (<b>1-Am</b>) (Cp* = pentamethylcyclopentadienide; <sup><i>t</i></sup>Bu<sub>2</sub>bipy = 4,4'-di-<i>tert</i>-butyl-2,2'-bipyridine), the first isolated and structurally verified americium complex containing a radical ligand, is reported. Theoretical calculations (DFT and multiconfigurational methods) alongside experimental comparisons of M-N distances reveal a greater degree of metal-ligand covalency in <b>1-Am</b> compared to near-isoradial lanthanide counterparts <b>1-Nd</b> and <b>1-Sm</b>. Electrochemical studies suggest that <b>1-Am</b> may behave as an "Am(II) synthon", and a preliminary attempt to probe the chemical reactivity of <b>1-Am</b> is briefly discussed.
Authors
- Andrew J. Gaunt (ORCID: https://orcid.org/0000-0001-9679-6020)
- Jared T. Stritzinger (ORCID: https://orcid.org/0000-0002-4155-1672)
- Enrique R. Batista (ORCID: https://orcid.org/0000-0002-3074-4022)
- Harris E. Mason (ORCID: https://orcid.org/0000-0002-1840-0550)
- Daniel J. Lussier (ORCID: https://orcid.org/0000-0002-6715-6443)
- Susan K. Hanson (ORCID: https://orcid.org/0000-0002-3230-8400)
- Jeffrey L. Miller
- Jesse Murillo
- Amanda A. Salazar
- Josef Tomecek
- Maria J. Beltrán-Leiva
- Ping Yang
Institutions
- Los Alamos National Laboratory (US)
- Division of Chemistry (US)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2026-03-12
- DOI
- https://doi.org/10.1021/jacs.5c22862
- Primary Topic
- Organometallic Complex Synthesis and Catalysis
- Type
- article
- Field-Weighted Citation Impact
- 0.00