Alberto Pérez-Bitrián, Julen Munárriz, Konstantin B Krause, Johanna Schlögl, Kurt F Hoffmann, Johanna S Sturm, Amiera N Hadi, Christian Teutloff, Anja Wiesner, Christian Limberg, Sebastian Riedel
Compounds containing Mn-O bonds are of utmost importance in biological systems and catalytic processes. Nevertheless, mononuclear manganese complexes containing all O-donor ligands are still rare. Taking advantage of the low tendency of the pentafluoroorthotellurate ligand (teflate, OTeF5 ) to bridge metal centers, we have synthesized two homoleptic manganese complexes with monomeric structures and an all O-donor coordination sphere. The tetrahedrally distorted MnII anion, [Mn(OTeF5 )4 ]2- , can be described as a high spin d5 complex ( S = 5/2), as found experimentally (magnetic susceptibility measurements and EPR spectroscopy) and using theoretical calculations (DFT and CASSCF/NEVPT2)...
April 17, 2024: Chemical Science