Redox‐Induced μ‐Acetato and μ‐Oxo Core Interconversions in Dinuclear Manganese Tris(2‐methylpyridyl)amine (tpa) Complexes: Isolation and Characterization of [Mn₂^III(μ‐O)(μ‐O₂CCH₃)(tpa)₂]³⁺

Abstract

The electrochemical properties of the bis (µ-acetato)

Electro‐ and Photoinduced Formation and Transformation of Oxido‐Bridged Multinuclear Mn Complexes

“…The same basic electrochemical behaviour is obtained with the bis(μ‐acetato) complex [Mn 2 II (O 2 CCH 3 ) 2 (tpa) 2 ] 2+ , which contains the tetradentate amino ligand tpa (Scheme , B), and only two acetato‐bridging ligands instead of three 98. The oxidation of [Mn 2 II (O 2 CCH 3 ) 2 (tpa) 2 ] 2+ in CH 3 CN is also irreversible but occurs at a much more positive potential ( E p a = 0.70 V) than for [Mn 2 II (O 2 CCH 3 ) 3 (bpea) 2 ] + .…”

Modeling the OEC with Two New Biomimetic Models: Preparations, Structural Characterization, and Water Photolysis Studies of a Ba–Mn Box Type Complex and a Mn4N6 Planar-Diamond Cluster

“…The electronic absorption spectrum of 1 shows two broad bands: a broad shoulder obtained at 510 nm (ε = 700 M −1 cm −1 ), attributable to a d-d transition, and a broad band at 484 nm (ε = 3100 M −1 cm −1 ), assigned to the phenolate → manganese(III) charge transfer. The energy and intensity of these two bands are in agreement with those reported for related manganese(III) complexes [27,28]. The paramagnetic 1 H NMR spectrum ( Figure S1 contains an up-field proton resonance outside the diamagnetic region at -24.17 ppm ( Figure S1) due to the isotropic shifting of the ligand protons for high-spin manganese(III) complexes in an octahedral field.…”

Catalytic Activity of Chloro and Triflate Manganese(II) Complexes in Epoxidation Reactions: Reusable Catalytic Systems for Alkene Epoxidation

“…Otherwise, the concomitant formation of Mn III mononuclear and oxo‐bridged Mn 2 (III,III) binuclear species cannot be excluded because these species cannot be detected by conventional X‐band EPR spectroscopy 24. Oxo‐bridged Mn 2 (III,III) binuclear species exhibit less intense visible bands than their (III,IV) or (IV,IV) analogues and are more difficult to detect by UV/Vis spectroscopy, especially when these species are present in low concentration 17a,25. If some of these species are present, they can also contribute to the visible absorption features, especially below 600 nm.…”