Change search
ReferencesLink to record
Permanent link

Direct link
Synthesis and redox properties of a meso-tris(4-nitrophenyl) corrolato Mn(III) complex
Show others and affiliations
2005 (English)In: Journal of Porphyrins and Phthalocyanines, ISSN 1088-4246, E-ISSN 1099-1409, Vol. 9, no 6, 379-386 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2005. Vol. 9, no 6, 379-386 p.
Keyword [en]
manganese, corrole, valence tautomerization, electrochemistry, EPR spectroscopy, transition-metal centers, high-spin manganese(iii), dual-mode epr, high-frequency, iron corroles, structural-characterization, noninnocent ligands, porphyrin complexes, oxidation-states, spectroscopy
URN: urn:nbn:se:kth:diva-14970ISI: 000231126000001ScopusID: 2-s2.0-23644445640OAI: diva2:333011
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

Open Access in DiVA

No full text

In the same journal
Journal of Porphyrins and Phthalocyanines

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 41 hits
ReferencesLink to record
Permanent link

Direct link