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This study aims to explore the multielectron redox chemistry of uranium and synthesize lower oxidation state complexes.

Multielectron Redox Chemistry of Uranium by Accessing the +II Oxidation State and Enabling Reduction to a U(I) Synthon

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This study aims to explore the multielectron redox chemistry of uranium and synthesize lower oxidation state complexes.
Synthesis of uranium complexes supported by tris(siloxide) ligands.
Cyclic voltammetry, EPR, UV/vis/NIR spectroscopies, and magnetic studies.
Computational analysis to assess electronic structures.
Cyclic voltammetry identified quasi-reversible redox waves at -3.27, -2.45, and -1.71 V for U(IV)/U(III), U(III)/U(II), and U(II)/U(III)–(arene) 2– couples.
Complexes 2 and 3 were confirmed to transfer two and three electrons, generating U(IV) products.
The study provides evidence of the effective platform created by the tris(siloxide) ligands for low-valent uranium chemistry.

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Randomized trial demonstrates multielectron transfer in uranium complexes, suggesting novel low-valent pathways.

Keener et al. (2023) studied this question.

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