Manganese(II) complexes of polydentate Schiff bases. 1. Synthesis, characterization, magnetic properties, and molecular structure

Mabad, B.; Cassoux, P.; Tuchagues, J. P.; Hendrickson, David N.

doi:10.1021/ic00229a025

Cited by 129 publications

(37 citation statements)

References 4 publications

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“…Spectra of this type have been observed in model complexes with a pair of Mn(II) ions [17,18] and in dimanganese concanavalin A [19]. In all these cases, the manganese oxidation state is Mn(II).…”

Section: Esr Spectroscopy Of Protein Bmentioning

confidence: 93%

Evidence that protein B of the thiosulphate‐oxidizing system of Thiobacillus versutus contains a binuclear manganese cluster

Cammack

Chapman

et al. 1989

FEBS Letters

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Manganese was shown to be an essential trace metal for growth and thiosulphate oxidation by Thiobacillus versutus in chemostat culture. In the thiosulphate-oxidizing enzyme system of T. versutus, protein B was the only component found to contain manganese in significant amounts. When it was examined by electron spin resonance (ESR) spectroscopy, protein B gave a broad, complex spectrum, indicative of the presence of a dimeric manganese cluster, with manganese in the Mn(II) oxidation state.Sulfur-oxidizing bacterium; ESR; Electron paramagnetic resonance spectroscopy; Manganese protein; (Thiobacillus versutus)

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Section: Esr Spectroscopy Of Protein Bmentioning

confidence: 93%

Evidence that protein B of the thiosulphate‐oxidizing system of Thiobacillus versutus contains a binuclear manganese cluster

Cammack

Chapman

et al. 1989

FEBS Letters

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“…Our formation constants and Gibbs free energies follow the sequence: 5-OMe 4 5-H 4 5-NO 2 4 5-Br 6 3.61 (AE0.02) 9.31 (AE0.08) À20.59 (AE0.05) À53.1 (AE0.2) HL 7 3.91 (AE0.08) 9.77 (AE0.09) À22.3 (AE0.2) À55.7 (AE0.2) HL 8 3.33 (AE0.05) 9.45 (AE0.06) À19.0 (AE0.1) À53.9 (AE0.1) HL 9 3.54 (AE0.09) 9.60 (AE0.07) À20.2 (AE0.2) À54.7 (AE0.2) HL 10 4.11 (AE0.07) 10.09 (AE0.09) À23.4 (AE0.2) À57.6 (AE0.2) HL 11 3.99 (AE0.08) 9.8 (AE0.1) À22.7 (AE0.2) À56.0 (AE0.2) HL 12 3.78 (AE0.07) 9.68 (AE0.08) À21.6 (AE0.2) À55.2 (AE0. 2) Hexacoordinate iron(III) 133…”

Section: Evaluation Of the Formation Constants And Gibbs Free Energy mentioning

confidence: 99%

“…Thermochromism and photochromism of the ligands [8], preparation, properties, and structural aspects of some Mn [9][10][11], Fe [12], Co [13][14][15], Cu [14][15][16][17], Ni [14,15], V [18], and Ga [12] complexes with these Schiff bases have been carried out. Comparatively little work is available on complexation and formation constants of Fe(III) compounds.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and formation constant of hexacoordinate iron(III) complexes

Asadi

Hemmateenejad

Mohammadikish

2009

Journal of Coordination Chemistry

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Twelve iron(III) complexes [Fe III (L X ) 2 ]ClO 4 , where (L X ) À is the deprotonated form of a series of asymmetric ligands containing pyridine and substituted phenol moieties (XPh(OH)-CH¼N-(CH 2 ) n -Py that X ¼ H, 5-Br, 5-NO 2 , 5-OMe, 4-OMe, 3-OMe, and n ¼ 1, 2), were synthesized and characterized by 1 H NMR, IR, UV-Vis spectroscopy, mass spectrometry, and elemental analysis. Formation constants were measured using UV-Vis spectrophotometric titration at constant ionic strength (0.10 M NaClO 4 ) at 25 (AE0.1) C. The trend of the complex formation of Fe(III) ion with a given tridentate ligand decreases as follows: 5-OMe 4 5-H 4 5-NO 2 4 5-Br 5-OMe 4 4-OMe 4 3-OMe

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“…Spectra have been identified as arising from dimer systems by their dissimilarity to the spectra of monomeric analogues [25], their similarity to other dimer spectra [26], or more definitively, by their characteristic 11-line hyperfine pattern with a splitting of 4.0-4.7 mT [27][28][29][30][31]. More detailed studies of Mn(II) dimer EPR spectra have attempted to deconvolute the experimental spectra at low temperatures into two base spectra arising from the S ¼ 1 and 2 spin manifolds using single-valued decomposition [32,33].…”

Section: Introductionmentioning

confidence: 99%

Quantitative analysis of dinuclear manganese(II) EPR spectra

Golombek

Hendrich

2003

Journal of Magnetic Resonance

103

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Manganese(II) complexes of polydentate Schiff bases. 1. Synthesis, characterization, magnetic properties, and molecular structure

Cited by 129 publications

References 4 publications

Evidence that protein B of the thiosulphate‐oxidizing system of Thiobacillus versutus contains a binuclear manganese cluster

Evidence that protein B of the thiosulphate‐oxidizing system of Thiobacillus versutus contains a binuclear manganese cluster

Synthesis, characterization, and formation constant of hexacoordinate iron(III) complexes

Quantitative analysis of dinuclear manganese(II) EPR spectra

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