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  1. Article

    Open Access

    Altering the spectroscopy, electronic structure, and bonding of organometallic curium(III) upon coordination of 4,4′−bipyridine

    Structural and electronic characterization of (Cp′3Cm)2(μ−4,4′−bpy) (Cp′ = trimethylsilylcyclopentadienyl, 4,4′−bpy = 4,4′−bipyridine) is reported and provides a rare example of curium−carbon bonding. Cp′3Cm disp...

    Brian N. Long, María J. Beltrán-Leíva, Joseph M. Sperling in Nature Communications (2023)

  2. No Access

    Article

    Isolation of a californium(II) crown–ether complex

    The actinides, from californium to nobelium (Z = 98–102), are known to have an accessible +2 oxidation state. Understanding the origin of this chemical behaviour requires characterizing CfII materials, but invest...

    Todd N. Poe, Harry Ramanantoanina, Joseph M. Sperling in Nature Chemistry (2023)

  3. Article

    Open Access

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

    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 k...

    Brian N. Long, María J. Beltrán-Leiva, Cristian Celis-Barros in Nature Communications (2022)

  4. Article

    Open Access

    Creation of an unexpected plane of enhanced covalency in cerium(III) and berkelium(III) terpyridyl complexes

    Controlling the properties of heavy element complexes, such as those containing berkelium, is challenging because relativistic effects, spin-orbit and ligand-field splitting, and complex metal-ligand bonding, ...

    Alyssa N. Gaiser, Cristian Celis-Barros, Frankie D. White in Nature Communications (2021)

  5. No Access

    Article

    Isolation and characterization of a californium metallocene

    Californium (Cf) is currently the heaviest element accessible above microgram quantities. Cf isotopes impose severe experimental challenges due to their scarcity and radiological hazards. Consequently, chemica...

    Conrad A. P. Goodwin, **g Su, Lauren M. Stevens, Frankie D. White in Nature (2021)

  6. No Access

    Article

    Compression of curium pyrrolidine-dithiocarbamate enhances covalency

    Curium is unique in the actinide series because its half-filled 5f 7 shell has lower energy than other 5f n configurations, rendering it both redox-inactive and resistant to forming chemical bonds that engage the...

    Joseph M. Sperling, Evan J. Warzecha, Cristian Celis-Barros in Nature (2020)