Multireversible Redox Processes in Pentanuclear Bis(Triple-Helical) Manganese Complexes Featuring an Oxo-Centered triangular {MnII2MnIII(μ3-O)}5+ or {MnIIMnIII2(μ3-O)}6+ Core Wrapped by Two {MnII2(bpp)3}−
| Autor: | Alain Deronzier, Marie-Noëlle Collomb, Antoni Llobet, Montserrat Rodríguez, Sophie Romain, Isabel Romero, Thibaut Stoll, Rodolphe Clérac, Corine Mathonière, Carole Duboc, Jordi Rich, Cristina Sens, Jordi Benet-Buchholz |
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| Rok vydání: | 2011 |
| Předmět: |
010405 organic chemistry
Inorganic chemistry chemistry.chemical_element Stereoisomerism Manganese 010402 general chemistry Electrochemistry 01 natural sciences Redox Chemical reaction 0104 chemical sciences 3. Good health Ion Inorganic Chemistry Crystal Crystallography chemistry Molecule Physical and Theoretical Chemistry |
| Zdroj: | Inorganic Chemistry. 50:8427-8436 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/ic201009z |
| Popis: | A new pentanuclear bis(triple-helical) manganese complex has been isolated and characterized by X-ray diffraction in two oxidation states: [{MnII(μ-bpp)3}2MnII2MnIII(μ-O)]3+ (13+) and [{MnII(μ-bpp)3}2MnIIMnIII2(μ-O)]4+ (14+). The structure consists of a central {Mn3(μ3-O)} core of MnII2MnIII (13+) or MnIIMnIII2 ions (14+) which is connected to two apical MnII ions through six bpp– ligands. Both cations have a triple-stranded helicate configuration, and a pair of enantiomers is present in each crystal. The redox properties of 13+ have been investigated in CH3CN. A series of five distinct and reversible one-electron waves is observed in the −1.0 and +1.50 V potential range, assigned to the MnII4MnIII/MnII5, MnII3MnIII2/MnII4MnIII, MnII2MnIII3/MnII3MnIII2, MnIIMnIII4/MnII2MnIII3, and MnIII5/MnIIMnIII4 redox couples. The two first oxidation processes leading to MnII3MnIII2 (14+) and MnII2MnIII3 (15+) are related to the oxidation of the MnII ions of the central core and the two higher oxidation waves, close in... |
| Databáze: | OpenAIRE |
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