Biologically relevant mono- and di-nuclear manganese ii/iii/iv complexes of mononegative pentadentate ligandsElectronic supplementary information (ESI) available: The ESI mass spectra of 1 at various tube-lens potentials. See http://www.rsc.org/suppdata/dt/b3/b300823a/

Water Oxidation Catalyzed by a Dinuclear Mn Complex: A Functional Model for the Oxygen‐Evolving Center of Photosystem II

“…It did not escape our attention that a series of dinuclear manganese complexes of the new pentadentate ligand mcbpen − , 2 for which we have identified complexes with the oxidation states Mn II /Mn II , Mn III /Mn III , Mn III /Mn IV , and Mn IV /Mn IV , is highly relevant as a model system for the OEC. Two molecules of water are coordinated in the stable, crystallographically characterized [Mn II 2 (mcbpen) 2 (H 2 O) 2 ](ClO 4 ) 2 ( 1 ‐(ClO 4 ) 2 ).…”

The manganese complex of photosystem II in its reaction cycle—Basic framework and possible realization at the atomic level

“…We note that the formation of new -oxo bridges in response to Mn oxidation (see, e.g. [181][182][183][184][185]) likely involves (de)protonation events, but quantitative information on this point is rare (e.g. relevant pK-values).…”

Transition metal complexes with Girard reagent-based ligands. Part V. Synthesis, characterization and crystal structure of pentagonal-bipyramidal manganese(II) complex with 2,6-diacetylpyridine bis(Girard-T hydrazone)

“…Remarkable interest of coordination chemists and pharmacologists in manganese complexes arises from the fact that manganese is a component of a number of biologically important redox systems like photosystem II and enzymes, e.g., catalase, peroxidase, superoxide dismutase, manganese ribonucleotide reductase and lipoxygenase [2]. Some of the synthetic manganese complexes act as superoxides [3][4][5] and NO dismutase [6], while the others show antifungal, [7-11], antibacterial [9-16], antioxidative [17] or anti-fertility [9] effects.…”