Reduction of Na+ within a {Mg2Na2} Assembly

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Abstract

Ionic compounds containing sodium cations are notable for their stability and resistance to redox reactivity unless highly reducing electrical potentials are applied. Here we report that treatment of a low oxidation state {Mg2Na2} species with non-reducible organic bases induces the spontaneous and completely selective extrusion of sodium metal and oxidation of the Mg(I) centers to the more conventional Mg(II) state. Although these processes are also characterized by a structural reorganisation of the initially chelated diamide spectator ligand, computational quantum chemical studies indicate that intramolecular electron transfer is abetted by the frontier molecular orbitals (HOMO/LUMO) of the {Mg2Na2} ensemble, which arise exclusively from the 3s valence atomic orbitals of the constituent sodium and magnesium atoms.
Original languageEnglish
JournalAngewandte Chemie-International Edition
Early online date16 Nov 2022
DOIs
Publication statusE-pub ahead of print - 16 Nov 2022

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