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Bis(imino)pyrazine-Supported Iron Complexes: Ligand-Based Redox Chemistry, Dearomatization, and Reversible C-C Bond Formation

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Bill,  Eckhard
Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Citation

Regenauer, N. I., Settele, S., Bill, E., Wadepohl, H., & Rosca, D.-A. (2020). Bis(imino)pyrazine-Supported Iron Complexes: Ligand-Based Redox Chemistry, Dearomatization, and Reversible C-C Bond Formation. Inorganic Chemistry, 59(4), 2604-2612. doi:10.1021/acs.inorgchem.9b03665.


Cite as: http://hdl.handle.net/21.11116/0000-0007-D35B-5
Abstract
Iron complexes supported by novel pi-acidic bis-(imino)pyrazine ((PDI)-D-Pz) ligands can be functionalized at the nonligated nitrogen atom, and this has a marked effect on the redox properties of the resulting complexes. Dearomatization is observed in the presence of cobaltocene, which reversibly reduces the pyrazine core and not the imine functionality, as observed in the case of the pyridinediimine-ligated iron analogues. The resulting ligand-based radical is prone to dimerization through the formation of a long carbon-carbon bond, which can be subsequently cleaved under mild oxidative conditions.