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Updated: Apr 21, 2026

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
From MgBr via single-electron transfer (SET) to a paramagnetic Mg(II) compound and back to Mg(I): [MgBr(L(1))˙]2 and
T Kruczyński1, P Henke, T Augenstein
1Karlsruhe Institute of Technology (KIT), Institute of Inorganic Chemistry, Engesserstr. 15, D-76131 Karlsruhe, Germany. breher@kit.edu hansgeorg.schnoeckel@kit.edu.
Abstract:
Since Mg(+) ions are isoelectronic to Na atoms, an easy single electron transfer (SET) can be expected for MgBr. Even at 190 K, the radical MgBr (obtained via its sophisticated condensation) in a metastable solution transfers its electron to a diazadiene entity. A paramagnetic Mg(II) compound [MgBr(L(1))˙]2 (4; L(1) = DippN=C(Me)C(Me)=NDipp) is formed consisting of a singly reduced ligand. As shown by EPR investigations, dimeric 4 dissociates in ethereal solvents to two monomeric subunits. In addition, 4 can subsequently be reduced with potassium to furnish again a Mg(I) compound, namely [K(thf)3]2[Mg2(L(1))2] (3).
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