Berkelium–carbon bonding in a tetravalent berkelocene DOI Open Access
Dominic R. Russo, Alyssa Gaiser, Amy N. Price

et al.

Science, Journal Year: 2025, Volume and Issue: 387(6737), P. 974 - 978

Published: Feb. 27, 2025

Interest in actinide–carbon bonds has persisted since actinide organometallics were first investigated for applications isotope separation during the Manhattan Project. Transplutonium are rarely isolated and structurally characterized, likely owing to limited inventories, a scarcity of suitable laboratory infrastructure, intrinsic difficulties with anaerobic conditions required. Herein, we report discovery an organometallic “berkelocene” complex prepared from 0.3 milligrams berkelium-249. Single-crystal x-ray diffraction shows tetravalent berkelium ion between two substituted cyclooctatetraene ligands, resulting formation berkelium–carbon bonds. The coordination berkelocene resembles that uranocene, calculations show 5f orbitals engage covalent overlap δ-symmetry cyclooctatetraenide ligand π system. Charge transfer ligands is diminished relative uranocene other actinocenes, which maximizes contributions stable, half-filled 7 configuration berkelium.

Language: Английский

Berkelium–carbon bonding in a tetravalent berkelocene DOI Open Access
Dominic R. Russo, Alyssa Gaiser, Amy N. Price

et al.

Science, Journal Year: 2025, Volume and Issue: 387(6737), P. 974 - 978

Published: Feb. 27, 2025

Interest in actinide–carbon bonds has persisted since actinide organometallics were first investigated for applications isotope separation during the Manhattan Project. Transplutonium are rarely isolated and structurally characterized, likely owing to limited inventories, a scarcity of suitable laboratory infrastructure, intrinsic difficulties with anaerobic conditions required. Herein, we report discovery an organometallic “berkelocene” complex prepared from 0.3 milligrams berkelium-249. Single-crystal x-ray diffraction shows tetravalent berkelium ion between two substituted cyclooctatetraene ligands, resulting formation berkelium–carbon bonds. The coordination berkelocene resembles that uranocene, calculations show 5f orbitals engage covalent overlap δ-symmetry cyclooctatetraenide ligand π system. Charge transfer ligands is diminished relative uranocene other actinocenes, which maximizes contributions stable, half-filled 7 configuration berkelium.

Language: Английский

Citations

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