Synthesis, crystal structure, electrochemical, and spectroelectrochemical properties of the new manganese(III) complex [MnIII(BBPEN)][PF6] [H2BBPEN = N,N'-bis(2-hydroxybenzyl)-N,N'-bis(2-methylpyridyl)ethylenediamine]

Neves, Ademir; Erthal, Sueli M.D.; Vencato, Ivo; Ceccato, Augusto S.; Mascarenhas, Yvonne P.; Nascimento, Otaciro Rangel; Hörner, Manfredo; Batista, Alzir A.

doi:10.1021/ic00049a008

Cited by 115 publications

(104 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…4C). The complexes presented here have an electrochemical behavior comparable to that observed for other manganese(II) complexes reported in the literature [52][53][54].…”

Section: Electrochemical Studiessupporting

confidence: 85%

Manganese(II) complexes with thiosemicarbazones as potential anti-Mycobacterium tuberculosis agents

Oliveira

Maia

Souza

et al. 2014

Journal of Inorganic Biochemistry

Self Cite

View full text Add to dashboard Cite

“…4C). The complexes presented here have an electrochemical behavior comparable to that observed for other manganese(II) complexes reported in the literature [52][53][54].…”

Section: Electrochemical Studiessupporting

confidence: 85%

Manganese(II) complexes with thiosemicarbazones as potential anti-Mycobacterium tuberculosis agents

Oliveira

Maia

Souza

et al. 2014

Journal of Inorganic Biochemistry

Self Cite

View full text Add to dashboard Cite

“…24 Spectroelectrochemistry was performed using an optically transparent thin-layer cell as previously described. 25 The ferrocenium/ferrocene couple was used to monitor the reference electrode. 24 Mössbauer spectra were measured at 298 K and 115 K against a 57 Co(Rh) source, operating in the constant acceleration mode.…”

Section: Materials and General Methodsmentioning

confidence: 99%

Synthesis, molecular structure and spectroscopic, electrochemical and magnetic properties of a new dinuclear iron complex containing µ-sulfate-di-µ-alkoxo bridges: evaluating the influence of the sulfate bridge on the physicochemical properties of the di-µ-alkoxo-diiron unit

Horn¹,

Vencato²,

Bortoluzzi³

et al. 2006

J. Braz. Chem. Soc.

Self Cite

View full text Add to dashboard Cite

“…22 Spectroelectrochemical experiments were carried out at room temperature in acetonitrile, under argon, with TBAPF 6 (0.1 mol L -1 ) as supporting electrolyte, using an optically transparent thinlayer cell constructed according a previously reported procedure. 23 A gold minigrid and a platinum wire were used, respectively, as working and auxiliary electrodes, and a SCE was used as the reference electrode. Potentials were applied with a PAR 263 potentiostat/galvanostat and the spectra were recorded with a Perkin-Elmer Lambda 19 spectrophotometer.…”

Section: Physical Measurementsmentioning

confidence: 99%

“…8, 2006 1 and 2, respectively. X-ray crystallographic analysis shows that the Fe III center is in a pseudo-octahedral environment, with the two halves of the bbimen 2-ligand coordinated in a facial mode (Figure 2 23 The equatorial plane is geometrically defined by the O1-O2-N1-N2 atoms, from which the Fe III deviates only 0.001 Å. The equatorial plane is then composed of two nitrogen and two oxygen atoms from the ethylenediamine backbone and the phenolate groups, respectively.…”

Section: X-ray Structural Characterizationmentioning

confidence: 99%

EPR and semi-empirical studies as tools to assign the geometric structures of FeIII isomer models for transferrins

Scarpellini¹,

Casellato²,

Bortoluzzi³

et al. 2006

J. Braz. Chem. Soc.

Self Cite

View full text Add to dashboard Cite

A reação entre Fe(ClO 4 ) 3 . nH 2 O e N,N'-bis[(2-hidroxibenzil)-N,N'-bis(1-metilimidazol-2-ilmetil)]etilenodiamina (H 2 bbimen) resulta na formação de dois isômeros geométricos, A e B, do cátion complexo [Fe(bbimen)] + , os quais foram isolados e caracterizados por espectroscopia na região do infravermelho e UV-visível, espectrometria de massas, medidas de condutividade molar, voltametria cíclica, espectroeletroquímica e espectroscopia de ressonância paramagnética eletrônica (RPE). A geometria de um desses isômeros foi claramente demonstrada por análise cristalográfica de raios X de monocristal. O composto cristaliza no sistema monoclínico, grupo espacial P2 1 /c, a = 14,104 (3), b = 15,626 (3), c = 13,291 (3) Å, β = 98,07 (3) o , Z = 4, R 1 = 6,35% e wR 2 = 20,57%. As propriedades eletroquímicas do cátion [Fe(bbimen)] + (-0,58 V versus NHE) são bastante similares às das transferrinas (-0,52 V versus NHE), indicando que o complexo é um bom modelo para as propriedades redox daquelas metaloenzimas. A espectroscopia de RPE foi a única técnica espectroscópica capaz de diferenciar os dois isômeros isolados (A e B). Os estudos de RPE revelaram que o isômero A trata-se de um complexo de Fe III spin alto distorcido rombicamente (E/D ≅ 0,33) e apresenta um espectro caracterizado por uma linha estreita em g 1 ≅ 4,1 e outra larga em g 2 ≅ 9,0. O espectro de RPE do isômero B apresenta, além das linhas em g 1 ≅ 4,2 e em g 2 ≅ 9,0, um conjunto de linhas em g 1 ≅ 3,0, g 2 ≅ 3,6 e g 3 ≅ 5,1, que têm sido atribuídas a complexos de Fe III com simetria tendendo à axial (E/ D ≅ 0,22). Estudos teóricos empregando cálculos semi-empíricos, combinados com os dados de RPE, foram essenciais para a atribuição das estruturas geométricas dos isômeros A e B.The reaction of Fe(ClO 4 ) 3 . nH 2 O with N,N'-bis[(2-hydroxybenzyl)-N,N'-bis(1-methylimidazole-2-yl-methyl)]ethylenediamine (H 2 bbimen) affords two geometric isomers, A and B, of the complex cation [Fe(bbimen)] + , which were fully characterized by IR and UV-visible spectroscopies, ESI mass spectrometry, molar conductivity measurements, cyclic voltammetry, spectroelectrochemistry and EPR spectroscopy. The geometry of one of these isomers has been clearly demonstrated through X-ray crystallographic analysis. It crystallizes in the monoclinic system, space group P2 1 /c, a = 14.104 (3), b = 15.626 (3), c = 13.291 (3) Å, β = 98.07 (3) o , Z = 4, R 1 = 6.35% and wR 2 = 20.57%. The electrochemical properties of [Fe(bbimen)] + are quite similar to those of transferrins (-0.52 V versus NHE) and indicate that it is a good model for the redox potential of these metalloenzymes. EPR spectroscopy was the only spectroscopic technique able to differentiate the isolated isomers A and B. EPR studies revealed that isomer A is better described as a rhombically distorted (E/D ≅ 0.33) highspin Fe III complex (g 1 ≅ 4.1 with a shoulder at g 2 ≅ 9.0), while the spectrum of B has a set of lines at g 1 ≅ 3.0, g 2 ≅ 3.6 and g 3 ≅ 5.1, in addition to the line at g 1 ≅ 4.2 and a shoulder at g 2 ≅ 9.0, which h...

show abstract

Synthesis, crystal structure, electrochemical, and spectroelectrochemical properties of the new manganese(III) complex [MnIII(BBPEN)][PF6] [H2BBPEN = N,N'-bis(2-hydroxybenzyl)-N,N'-bis(2-methylpyridyl)ethylenediamine]

Cited by 115 publications

References 0 publications

Manganese(II) complexes with thiosemicarbazones as potential anti-Mycobacterium tuberculosis agents

Manganese(II) complexes with thiosemicarbazones as potential anti-Mycobacterium tuberculosis agents

Synthesis, molecular structure and spectroscopic, electrochemical and magnetic properties of a new dinuclear iron complex containing µ-sulfate-di-µ-alkoxo bridges: evaluating the influence of the sulfate bridge on the physicochemical properties of the di-µ-alkoxo-diiron unit

EPR and semi-empirical studies as tools to assign the geometric structures of FeIII isomer models for transferrins

Contact Info

Product

Resources

About