Cyclopentadienyl coordination induces unexpected ionic Am-N bonding in an americium bipyridyl complex.
basic_science · Level V
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- Record sourced from PubMed, PMID 35017503.
- Also identified by DOI 10.1038/s41467-021-27821-4 and PMC identifier 8752859.
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Abstract
Variations in bonding between trivalent lanthanides and actinides is critical for reprocessing spent nuclear fuel. The ability to tune bonding and the coordination environment in these trivalent systems is a key factor in identifying a solution for separating lanthanides and actinides. Coordination of 4,4'-bipyridine (4,4'-bpy) and trimethylsilylcyclopentadienide (Cp') to americium introduces unexpectedly ionic Am-N bonding character and unique spectroscopic properties. Here we report the structural characterization of (Cp'<sub>3</sub>Am)<sub>2</sub>(μ - 4,4'-bpy) and its lanthanide analogue, (Cp'<sub>3</sub>Nd)<sub>2</sub>(μ - 4,4'-bpy), by single-crystal X-ray diffraction. Spectroscopic techniques in both solid and solution phase are performed in conjunction with theoretical calculations to probe the effects the unique coordination environment has on the electronic structure.