A mesoionic carbene complex of manganese in five oxidation states
Benjamin Wittwer, Nicole Dickmann, Stephan Berg, Daniel Leitner, Lorenzo Tesi, David Hunger, Raphael Gratzl, Joris van Slageren, Nicolás I. Neuman, Dominik Munz, Stephan Hohloch
Abstract
Reaction between a carbazole-based mesoionic carbene ligand and manganese(II) iodide results in the formation of a rare air-stable manganese(IV) complex after aerobic workup. Cyclic voltammetry reveals the complex to be stable in five oxidation states. The electronic structure of all five oxidation states is elucidated chemically, spectroscopically (NMR, high-frequency EPR, UV-Vis, MCD), magnetically, and computationally (DFT, CASSCF).
Topics & Concepts
MesoionicCarbeneManganeseChemistryPhotochemistryCombinatorial chemistryOrganic chemistryCatalysisN-Heterocyclic Carbenes in Organic and Inorganic ChemistryOrganometallic Complex Synthesis and CatalysisMagnetism in coordination complexes