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Homoleptic Aryl Complexes of Uranium (IV)
Nikki J Wolford1, Dumitru-Claudiu Sergentu2, William W Brennessel1
1Department of Chemistry, University of Rochester, B31 Hutchison Hall, 120 Trustee Road, Rochester, NY, 14627, USA.
Angewandte Chemie (International Ed. in English)
|May 24, 2019
Summary
Chemists have synthesized and characterized novel uranium complexes with uranium-carbon bonds, solving a long-standing challenge in organouranium chemistry. These findings offer new insights into the electronic structure and bonding of these unique compounds.
Area of Science:
- Organometallic Chemistry
- Inorganic Chemistry
- Uranium Chemistry
Background:
- For over 70 years, synthesizing sterically unencumbered homoleptic organouranium aryl complexes with U-C σ-bonds has been a significant challenge.
- Previous research has not fully elucidated the electronic structure and bonding in such systems.
Purpose of the Study:
- To report the first structurally characterized, sterically unencumbered homoleptic uranium(IV) aryl-ate species.
- To investigate the electronic structure and U-C σ-bond interactions in these novel complexes.
Main Methods:
- Synthesis and structural characterization of [U(Ar)6]2- complexes (Ar=Ph, p-tolyl, p-Cl-Ph).
- Magnetic circular dichroism (MCD) spectroscopy.
- Computational studies.
Main Results:
- Successfully synthesized and characterized novel homoleptic uranium(IV) aryl-ate complexes.
- MCD spectroscopy and computational studies provided detailed insights into the electronic structure.
- Established a deeper understanding of the U-C σ-bond across the studied series.
Conclusions:
- This work overcomes a decades-long challenge in synthetic uranium chemistry.
- Enables new insights into the electronic structure and bonding of organouranium complexes.
- Paves the way for future research in uranium-based organometallic chemistry.
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