Crystal and molecular structure of bis(dimethylglyoximato) diimidazoleiron(II)-dimethanol

Bowman, Karl M.; Gaughan, Arthur P.; Dori, Zvi

doi:10.1021/ja00758a008

Cited by 55 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The iron-nitrogen distances to His-18 and the iron-sulfur distances are consistent with those observed in model compounds (23)(24)(25). In neither the model compounds nor in tuna cytochrome is a change in oxidation state of the iron accompanied by significant changes in Fe-N and Fe Fig.…”

Section: Resultssupporting

confidence: 82%

Redox conformation changes in refined tuna cytochrome c.

Takano¹,

Dickerson²

1980

Proc. Natl. Acad. Sci. U.S.A.

143

View full text Add to dashboard Cite

show abstract

Section: Resultssupporting

confidence: 82%

Redox conformation changes in refined tuna cytochrome c.

Takano¹,

Dickerson²

1980

Proc. Natl. Acad. Sci. U.S.A.

143

View full text Add to dashboard Cite

show abstract

“…The rates were proportional to the concentration of 0 2 , but inversely proportional to the concentration of irnidazole, as shown in Table 2 (exps. [1][2][3][4][5].…”

Section: ) -mentioning

confidence: 99%

“…Among the several dioxime complexes, the bis(dimethylg1y-oximato)bis(irnidazole)iron(II) complex [Fe(Hdmg)2(Him)J, because of its well known molecular structure (5) which resembles the porphyrin species with biologically important ligands, has attracted our attention. O n the other hand, in contrast with the pyridine analogues, the imidazole complex is soluble enough in water for comparative studies with the biological hemes.…”

Section: Introductionmentioning

confidence: 99%

Electron transfer and autoxidation kinetics of the bis(imidazole)bis(dimethylglyoximato)iron(II) complex

Toma¹,

Silva²

1986

Can. J. Chem.

View full text Add to dashboard Cite

. Can. J. Chem. 64, 1280Chem. 64, (1986. The properties and reactivity of the bis(imidazo1e)bis-(dimethylglyoximato)irn(II) complex have been studied based on spectroelectrochemistry, cyclic voltammetry, and stopped-flow kinetics in aqueous solution. The autoxidation reaction was found to be inhibited by the imidazole ligand in excess but susceptible to copper(I1) catalysis. In this case a mechanism has been proposed, consisting of a rapid electron transfer followed by the reoxidation of the resulting Cu(1) species by 02. HENRIQUE E. TOMA et ANTONIO CARLOS C. SILVA. Can. J. Chem. 64, 1280Chem. 64, (1986.OpCrant en solution aqueuse et faisant appel i la spectroClectrochirnie, i la voltarnktrie cyclique et i la cinCtique par flux stoppC, on a CtudiC les propriCtCs et la rCactivitC du complexe bis(imidazo1e) bis(dimCthyg1yoximato) fer(I1). On a trouvC que la rCaction d'auto-oxydation est inhibCe par le ligand irnidazole qui est 1jrCsent en excks, alors qu'elle est susceptible i la catalyse par le cuivre(I1). Dans ce cas, on propose un mCcanisme d'aprks lequel il se produit une transfert rapide d'Clectron qui est suivi d'une rkoxydation, par le 0 2 , de l'espkce Cu(1) qui rCsulte.[Traduit par la revue]. IntroductionDioxime complexes of iron(II) are interesting examples of coordination compounds which mimic hemoglobin and mioglobin in their ability t o reversibly bind carbon monoxide (1-4).Among the several dioxime complexes, the bis(dimethylg1y-oximato)bis(irnidazole)iron(II) complex [Fe(Hdmg)2(Him)J, because of its well known molecular structure (5) which resembles the porphyrin species with biologically important ligands, has attracted our attention. O n the other hand, in contrast with the pyridine analogues, the imidazole complex is soluble enough in water for comparative studies with the biological hemes. In this work we have studied the properties and reactivity of the [Fe(Hdmg)2(Him)2] complex, with particular emphasis o n the electrochemistry and redox kinetics in aqueous solution. We have also investigated the autoxidation mechanisms, including the copper-catalyzed reaction, because of their possible relevance to the understanding of the biological oxidation processes (6)(7)(8). Experimental The electronic spectra of the complexes in the visible and uv region were recorded on a Cary 17 or a Hewlett-Packard 8451 diode-may spectrophotometer fittedwith thermostatted cell compartments. Cyclic voltammetry measurements were carried out with a Princeton Applied Research instrument, consisting of a 173 potentiostat and a 175 universal programmer. A platinum electrode was employed for the measurements, using the conventional Luggin capillary with the Ag/AgC1(1 M KCl) reference electrode in a non-isothermic mangement. A platinum wire was used as the auxiliary electrode.Spectroelectrochemica1 measurements were carried out using the diode-may spectrophotometer and the 173 potentiostat, with a transparent electrochemical cell of 0.03 cm internal optical pathlength. A gold minigrid was employed as the working electro...

show abstract

“…A second molecule of X may also be absorbed, though no oxygen containing species of either stoichiometry has been isolated in the solid state (17). The similarity to the hemes is explained by the relation in structure between the iron porphyrin system and the planar Fe(dmg)2 unit (17,18), which is shown schematically (I). properties of the two species upon addition of the same axial ligands to support this proposal (17,19).…”

Section: Hemesmentioning

confidence: 99%

Bioinorganic chemistry. Simple models of iron sites in some biological systems

Rayner‐Canham¹,

Lever²

1972

J. Chem. Educ.

View full text Add to dashboard Cite

Bioinorganic ChemistryS/mp/e models of iron sites in some biological systems The complexity of biological systems renders a detailed study of their mechanism very difficult. An increasingly popular method of elucidating structures and mechanisms is the use of a simple model wherein aspects of the structure or properties of the biological system are imitated by a simple chemical compound or system. A major part of the study involves the role of metal ions in biological processes, the field of bio-inorganic chemistry. 157 (1971).

show abstract

Crystal and molecular structure of bis(dimethylglyoximato) diimidazoleiron(II)-dimethanol

Abstract: Hedaya and L. Skattebol for their stimulating discussions and kind supply of 2-and 4-iodopyridines.Crystal and Molecular Structure of Bis (dimethylglyoximato) diimidazoleiron (II) -Dimethanol

Cited by 55 publications

References 0 publications

Redox conformation changes in refined tuna cytochrome c.

Redox conformation changes in refined tuna cytochrome c.

Electron transfer and autoxidation kinetics of the bis(imidazole)bis(dimethylglyoximato)iron(II) complex

Bioinorganic chemistry. Simple models of iron sites in some biological systems

Contact Info

Product

Resources

About