Soft X-ray signatures of cationic manganese-oxo systems, including a high-spin manganese(V) complex
Mickaël G Delcey1, Rebecka Lindblad2,3,4, Martin Timm3,5
1Department of Chemistry - Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden. marcus.lundberg@kemi.uu.se.
Abstract:
Manganese-oxo species catalyze key reactions, including C-H bond activation or dioxygen formation in natural photosynthesis. To better understand relevant reaction intermediates, we characterize electronic states and geometric structures of [MnO]+ manganese-oxo complexes that represent a wide range of manganese oxidation states. To this end, we apply soft X-ray spectroscopy in a cryogenic ion trap, combined with multiconfigurational wavefunction calculations. We identify [MnO2]+ as a rare high-spin manganese(V) oxo complex with key similarities to six-coordinated manganese(V) oxo systems that are proposed as reaction intermediates in catalytic dioxygen bond formation.
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