1989
DOI: 10.1021/ja00196a013
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Abstract: ChemInform Abstract The title complexes (I) (space group P21/n, Z=4) and (II) (Pca21, Z=4) are prepared by reaction of Mn(III) acetate of Mn(II) acetate with the corresponding ligand in the presence of acetate followed by addition of HClO4 or -in the case of (II) -of Na perchlorate and air oxidation. These complexes are characterized by X-ray structure analysis, variable-temp. magnetic susceptibility, novel EPR data, 1H NMR, and UV/VIS spectra. Cyclic voltammetric studies show that both complexes undergo two o… Show more

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Cited by 121 publications
(95 citation statements)
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“…77,78 It is, however, interesting that all Mn II Mn III model compounds exhibit only one -oxo bridge, but two carboxylate bridges. 26,31,46,47 Recently, a mutant (Y42F) from MnCAT of L. plantarum has been investigated by X-ray diffraction. 16 Albeit Tyr42 is at a distance of about 4Å from Mn in the wild type, this mutation interrupts a network of hydrogen bonds, leading to an 'open' form of the oxidized Mn III Mn III cluster, where one of the two -oxo bridges in the wild type is now bound to only one Mn.…”
Section: Discussion Of Results With Respect To Catalase Structure Andmentioning
confidence: 99%
“…77,78 It is, however, interesting that all Mn II Mn III model compounds exhibit only one -oxo bridge, but two carboxylate bridges. 26,31,46,47 Recently, a mutant (Y42F) from MnCAT of L. plantarum has been investigated by X-ray diffraction. 16 Albeit Tyr42 is at a distance of about 4Å from Mn in the wild type, this mutation interrupts a network of hydrogen bonds, leading to an 'open' form of the oxidized Mn III Mn III cluster, where one of the two -oxo bridges in the wild type is now bound to only one Mn.…”
Section: Discussion Of Results With Respect To Catalase Structure Andmentioning
confidence: 99%
“…Comparable spectra from coupled Mn II /Mn II dimers have been reported on several occasions and are well characterized. [46] The origin of the first species, observed at low temperature, is unclear. In low-symmetry Mn II centers, the zero-field splitting causes the levels in the spin system to be nondegenerate and often only the lowest-lying doublet can be observed.…”
Section: Resultsmentioning
confidence: 99%
“…[26] The wide spectral width and large line-splitting features have been observed for other Mn II,III 2 species with similar core structures and were explained as a consequence of large anisotropies of the g factor, hyperfine coupling constant and line-width parameters. [34,35] After further reduction of 1 at a potential of -1.01 V (coulombic yield 90 % of one electron), an EPR spectrum is obtained which is a superposition of different spectral components (Figure 3d). A small fraction of the spectrum of residual Mn [36,37] To the best of our knowledge, a similar signal has not been reported before for a dimeric manganese compound.…”
Section: Electrochemical Redox Reactionsmentioning
confidence: 99%