ArticleChemical science2021
Actinide tetra-N-heterocyclic carbene 'sandwiches'.
Article in Chemical science, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
4 citing papers in PubMed.
- Uranyl Recognition through Cucurbit[7]uril-Bipyridinium Carboxylate Pseudorotaxanes as Supramolecular Chelators.ACS omega · 2026Article
- Tris(carbene)borates; alternatives to cyclopentadienyls in organolanthanide chemistry.Dalton transactions (Cambridge, England : 2003) · 2023Article
- Mesoionic Carbene Complexes of Uranium(IV) and Thorium(IV).Organometallics · 2022Article
- Mesoionic Carbenes in Low- to High-Valent Vanadium Chemistry.Inorganic chemistry · 2021Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Highly-symmetrical, thorium and uranium octakis-carbene 'sandwich' complexes have been prepared by 'sandwiching' the An(iv) cations between two anionic macrocyclic tetra-NHC ligands, one with sixteen atoms and the other with eighteen atoms. The complexes were characterized by a range of experimental methods and DFT calculations. X-ray crystallography confirms the geometry at the metal centre can be set by the size of the macrocyclic ring, leading to either square prismatic or square anti-prismatic shapes; the geometry of the latter is retained in solution, which also undergoes reversible, electrochemical one-electron oxidation or reduction for the uranium variant. DFT calculations reveal a frontier orbital picture that is similar to thorocene and uranocene, in which the NHC ligands show almost exclusively σ-donation to the metal without π-backbonding.
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Registered trials
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