Ferrocene-Based Tetradentate Schiff Bases as Supporting Ligands in Uranium Chemistry
Clément Camp1, Lucile Chatelain1,2, Victor Mougel1
1†Univ. Grenoble Alpes, INAC-LCIB, RICC, and §CEA, INAC-LCIB F-38000 Grenoble, France.
Abstract:
Uranyl(VI), uranyl(V), and uranium(IV) complexes supported by ferrocene-based tetradentate Schiff-base ligands were synthesized, and their solid-state and solution structures were determined. The redox properties of all complexes were investigated by cyclic voltammetry. The bulky salfen-(t)Bu2 allows the preparation of a stable uranyl(V) complex, while a stable U(IV) bis-ligand complex is obtained from the salt metathesis reaction between [UI4(OEt2)2] and K2salfen. The reduction of the [U(salfen)2] complex leads to an unprecedented intramolecular reductive coupling of the Schiff-base ligand resulting in a C-C bond between the two ferrocene-bound imino groups.
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