{
  "abstract": "Uranocene, [U IV (η ⁸ -C ₈ H ₈ ) ₂ ], is the actinide equivalent to ferrocene. While ferrocene is readily oxidised to the ferrocenium cation, higher oxidation states of uranocene are unknown. Here we report the elusive uranocenium cation, [U V (η ⁸ -C ₈ H ₈ ) ₂ ] ⁺ , and demonstrate using electron paramagnetic resonance spectroscopy and magnetometry that this formal U(V) complex has a 5 f ¹ ground state. Enhanced uranium 5 f and 6 d mixing into filled δ-symmetry bonding orbitals in uranocenium, compared to uranocene, amplifies interorbital electron–electron repulsion, and counteracts bond length contraction, which minimises structural change. This manifests in solution where the uranocene/uranocenium redox couple exhibits near-ideal electrochemical reversibility, and in the solid-state where X-ray diffraction studies show minimal U–C bond length change upon oxidation. This demonstrates a case where actinide covalency governs molecular structure and physical properties across both solid and solution phases.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 10,
  "authors": [
    {
      "name": "Cameron N. Deakin"
    },
    {
      "name": "Iulia Turcas",
      "orcid": "0009-0008-8907-7763"
    },
    {
      "name": "Benjamin L. L. Réant"
    },
    {
      "name": "Liam P. Griffin",
      "orcid": "0009-0001-0896-888X"
    },
    {
      "name": "John A. Seed",
      "orcid": "0000-0002-3751-0325"
    },
    {
      "name": "Adam Brookfield"
    },
    {
      "name": "David Collison"
    },
    {
      "name": "Eric J. L. McInnes",
      "orcid": "0000-0002-4090-7040"
    },
    {
      "name": "Andrew Kerridge",
      "orcid": "0000-0002-2876-1202"
    },
    {
      "name": "Conrad A. P. Goodwin",
      "orcid": "0000-0002-4320-2548"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d73345acgpcxj.bib",
  "cited_by": 0,
  "doi": "10.1038/s41467-026-77066-2",
  "fulltext_url": "https://europepmc.org/articles/PMC13694272",
  "id": "d73345acgpcxj",
  "issns": [
    "2041-1723"
  ],
  "landing_url": "https://www.nature.com/articles/s41467-026-77066-2",
  "language": "eng",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1604|Radioactive element chemistry and processing"
    ]
  ],
  "openalex": "W7223360973",
  "pdf_url": "https://www.nature.com/articles/s41467-026-77066-2.pdf",
  "pmcid": "PMC13694272",
  "pmid": "42919861",
  "published": "2026-10-23",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/d73345acgpcxj.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:39Z",
      "native_id": "10.1038/s41467-026-77066-2",
      "source": "crossref",
      "url": "https://www.nature.com/articles/s41467-026-77066-2"
    },
    {
      "first_seen": "2026-10-30T12:20:33Z",
      "native_id": "MED:42919861",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42919861"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1604|Radioactive element chemistry and processing",
      "subfield": "inorganic"
    }
  ],
  "title": "Isolation of uranocenium, the bis-[8]annulene uranium cation",
  "title_text": "Isolation of uranocenium, the bis-[8]annulene uranium cation",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:20:33Z",
  "url": "https://research.draconitic.com/paper/d73345acgpcxj",
  "venue": "Nature Communications",
  "versions": []
}