Cyclopentadienyl coordination induces unexpected ionic Am−N bonding in an americium bipyridyl complex

Brian N. Long, María J. Beltrán-Leiva, Cristian Celis-Barros, Joseph M. Sperling, Todd N. Poe, Ryan E. Baumbach, Cory J. Windorff and Thomas E. Albrecht-Schönzart ()
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Brian N. Long: Florida State University
María J. Beltrán-Leiva: Florida State University
Cristian Celis-Barros: Florida State University
Joseph M. Sperling: Florida State University
Todd N. Poe: Florida State University
Ryan E. Baumbach: National High Magnetic Field Laboratory
Cory J. Windorff: Florida State University
Thomas E. Albrecht-Schönzart: Florida State University

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: 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′3Am)2(μ − 4,4′−bpy) and its lanthanide analogue, (Cp′3Nd)2(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.

Date: 2022
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DOI: 10.1038/s41467-021-27821-4

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