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Synthesis and redox...
Synthesis and redox properties of a meso-tris(4-nitrophenyl) corrolato Mn(III) complex
- Article/chapterEnglish2005
Publisher, publication year, extent ...
Numbers
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LIBRIS-ID:oai:DiVA.org:kth-14970
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-14970URI
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https://doi.org/10.1142/S1088424605000472DOI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20100525
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The Mn complexated corrole [T(4-NO2P)Corr]Mn(py) (3) has been prepared (py = pyridine) where [T(4-NO2P)Corr] is the trianion of the electron-poor 5,10,15-tris(4-nitrophenyl)-corrole (1). The preparation of 3 includes a new synthetic method to form the corrole ligand 1 in a two-step synthesis. The Mn(III) complex gives a parallel mode EPR signal centered around g = 8.2 with six distinct hyperfine lines (A(parallel to) = 139 x 10(-4) cm(-1)). Electrochemically 3 undergoes one reversible oxidation (E-1/2 = 0.12 V vs Fc) and two reversible reductions (E-1/2 = -1.45, -1.61 V). The oxidation is metal-centered and the product has been characterized by EPR spectroscopy as an S = 3/2 Mn(IV) species with no indication for oxidation of the macrocycle. The reductions of complex 3 are ligand based, and at the potential of the second reduction step a stable nitrogen centered radical with g = 2.0055 is generated. Chemical oxidation of 3 by iodosobenzene yields a Mn(IV) complex and epoxidation of cis-stilbene is not catalyzed by the Mn complex.
Subject headings and genre
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manganese
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corrole
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valence tautomerization
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electrochemistry
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EPR spectroscopy
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transition-metal centers
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high-spin manganese(iii)
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dual-mode epr
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high-frequency
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iron corroles
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structural-characterization
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noninnocent ligands
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porphyrin complexes
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oxidation-states
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spectroscopy
Added entries (persons, corporate bodies, meetings, titles ...)
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Eilers, G.
(author)
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Feyziyev, Y.
(author)
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Magnuson, A.
(author)
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Sun, Licheng C.
(author)
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Lomoth, R.
(author)
Related titles
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In:Journal of Porphyrins and Phthalocyanines9:6, s. 379-3861088-42461099-1409
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