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Synthesis, Characterization and Reactivity Study of a New Penta-Coordinated Mn(II) Complex
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
2009 (English)In: Applied Magnetic Resonance, ISSN 0937-9347, E-ISSN 1613-7507, Vol. 36, no 1, 9-24 p.Article in journal (Refereed) Published
Abstract [en]

A penta-coordinated Mn(II) compound [dqpMnCl(2)] (1) (dqp = 2,6-di-(8-quinoline-yl)-pyridine) has been synthesized and its X-ray crystallographic structure is reported here. Magnetic susceptibility measurements confirmed a high-spin Mn(II) (S = 5/2) center in 1. The X-band EPR spectrum of 1 in dimethylformamide solution exhibits widely distributed transitions in the spectral range from 0 to 700 mT with particularly well-resolved hyperfine lines due to the Mn-55 (I = 5/2) nucleus. The abundance of highly resolved transition lines in the spectrum facilitated the electron paramagnetic resonance spectral simulation which revealed large zero-field splitting and g-anisotropies. When dissolved, 1 exists in equilibrium with a hexa-coordinated species, the latter probably resulting from disassociation of one chlorido-ligand allowing ligation of two solvent molecules. The redox behavior of 1 was studied and was compared to that of a structural analog for which water oxidation in the presence of a chemical oxidant has been shown. The results from water oxidation trials of 1 are discussed.

Place, publisher, year, edition, pages
2009. Vol. 36, no 1, 9-24 p.
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Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-127460DOI: 10.1007/s00723-009-0008-4ISI: 000271068300002OAI: oai:DiVA.org:uu-127460DiVA: diva2:330167
Available from: 2010-07-15 Created: 2010-07-13 Last updated: 2017-12-12Bibliographically approved

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Berggren, Gustav

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