A mesoionic carbene complex of manganese in five oxidation states

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).

Automated summary

This study elucidates the electronic structure of a rare manganese complex formed by the reaction between a carbazole-based mesoionic carbene ligand and manganese(ii) iodide using a combination of chemical, spectroscopic, magnetic, and computational techniques.