Authors
John A Seed, Jhen-Kuei Yu, Florian Meurer, Adam Brookfield, Floriana Tuna, Ashley J Wooles, Michael Bodensteiner, Max M Hansmann, Stephen T Liddle
Published in
Nature chemistry. Oct 02, 2026. Epub Oct 02, 2026.
Abstract
Since their discovery in 1973, transition metal Fischer carbynes have become a foundational class of metal-carbon triple bond in organometallic chemistry. However, even though the uranium Fischer carbyne bonding motif has been a fundamental target in f-element chemistry, its isolation has remained challenging. Here we report the synthesis and characterization of the uranium Fischer-type carbyne complex [N″3U(μ-CNN)UN″3] (N″ = N(SiMe3)2). Single-crystal X-ray diffraction analysis reveals a uranium-carbyne distance of 2.379(15) Å, and density functional theory calculations combined with experimental quantum crystallography Hirshfeld atom refinement reveal the presence of two-electron C→U σ-donation, weak two-electron C→U π-donations and two orthogonal one-electron U→C π-back-bonds, demonstrating σ2π1π1 Fischer-type carbyne bonding overall. This work redefines the range of bonding modes for the diazomethanediide ligand and reveals a uranium-carbon triple-bond interaction that is related, yet distinct from transition metal Fischer carbynes, providing a basis to develop and understand f-element carbyne chemistry.
PMID:
42827099
Bibliographic data and abstract were imported from PubMed on 03 Oct 2026.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 31
- Comments 0