Uranocenium: synthesis, structure and chemical bonding

Layfield, Richard, Guo, Fu-Sheng, Tong, Ming-Liang, Chen, Yan-Cong and Mansikkamaki, Akseli (2019) Uranocenium: synthesis, structure and chemical bonding. Angewandte Chemie International Edition. ISSN 1433-7851

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Abstract

Abstraction of iodide from [(5-C5iPr5)2UI] (1) produces the cationic uranium(III) metallocene [(5-C5iPr5)2U]+ (2) as a salt of [B(C6F5)4]–. The structure of 2 consists of unsymmetrically bonded cyclopentadienyl ligands and a bending angle of 167.82° at uranium. Analysis of the bonding in 2 shows that the uranium 5f orbitals are strongly split and mixed with the ligand orbitals, leading to non-negligible covalent contributions to the bonding. Studying the dynamic magnetic properties of 2 reveals that the 5f covalency leads to partially quenched anisotropy and fast magnetic relaxation in zero applied magnetic field. Application of a magnetic field leads to dominant relaxation via a Raman process.

Item Type: Article
Keywords: uranium, organometallics, molecular magnetism
Schools and Departments: School of Life Sciences > Chemistry
Related URLs:
Depositing User: Richard Layfield
Date Deposited: 10 May 2019 11:45
Last Modified: 29 Apr 2020 01:00
URI: http://sro.sussex.ac.uk/id/eprint/83665

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