Kinetics of reactions of Schiff base complexes of iron(II). V. Reactions of the complex of the hexadentate ligand <i>NN</i>‴‐bis‐[α‐(2‐pyridyl)benzylidene]triethylenetetramine in acid solution and with hydroxide, cyanide, and peroxodisulphate

Gardner, E. R.; Mekhail, F. M.; Burgess, John

doi:10.1002/kin.550060113

Cited by 15 publications

(5 citation statements)

References 35 publications

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“…Moreover, these complexes are also important for the asymmetric oxidation of organic substrates, since their structure and catalytic activity are analogous with those of iron porphyrins [26]. Despite the importance of iron Schiff base complexes, little work has been devoted to the acid hydrolysis of these complexes [27]. More kinetic data concerning the acid hydrolysis of the hydro- 1 The article is published in the original.…”

Section: Introductionmentioning

confidence: 98%

Kinetics of acid hydrolysis and reactivity of some antibacterial hydrophilic iron(II) imino-complexes

Shaker

Nassr

Adam

et al. 2015

Russ. J. Phys. Chem.

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Kinetic study of acid hydrolysis of some hydrophilic Fe(II) Schiff base amino acid complexes with antibacterial properties was performed using spectrophotometry. The Schiff base ligands were derived from sodium 2-hydroxybenzaldehyde-5-sulfonate and glycine, L-alanine, L-leucine, L-isoleucine, DL-methionine, DL-serine, or L-phenylalanine. The reaction was studied in aqueous media under conditions of pseudo-first order kinetics. Moreover, the acid hydrolysis was studied at different temperatures and the activation parameters were calculated. The general rate equation was suggested as follows: rate = k obs [Complex], where k obs = k 2 [H + ]. The evaluated rate constants and activation parameters are consistent with the hydrophilicity of the investigated complexes.

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Section: Introductionmentioning

confidence: 98%

Kinetics of acid hydrolysis and reactivity of some antibacterial hydrophilic iron(II) imino-complexes

Shaker

Nassr

Adam

et al. 2015

Russ. J. Phys. Chem.

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“…In some instances, especially for the Schiff's base complex, k~ has been found to be negligible and the expression is simply that given as in (2).…”

Section: Introductionmentioning

confidence: 97%

Equilibria in complexes ofN-heterocyclic molecules, Part XV+. Intermediates in the reaction of cyanide with transition metal tris complexes of 1,10-phenanthroline, 5-nitro-1,10-phenanthroline and 2,2'-bipyridyl

Gillard

Williams

1977

Transition Met Chem

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SummaryThe Ru(phen)3 (CN)2 • 6 H20, Ru(bipy)3 (CN)2 • 6 H20, Fe(phen)3 (CN)2 • H20 and Ru(5-NO2P) 3 (CN)2 • 2 H20 compounds have been isolated during the reaction of the parent cations with aqueous cyanide solutions. It is evident, that in each case, attack at the ligand has taken place v/a the cyanide nucleophile, though the equilibrium constant for the formation of the Reissert-type species are widely different. The implications of the findings with respect to the known reaction kinetics of the parent ions in aqueous cyanide solution are discussed.

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“…Iron(II) Schiff base amino acid complexes are important chelates containing a metal in unstable, low oxidation state, as well as involving unstable ligands . Even though, little attention is devoted to their reactivities toward acid hydrolysis . Therefore, the recent work investigates the acid‐catalyzed hydrolysis of some biologically active high‐spin Fe(II) Schiff base amino acid chelates in aqueous medium and in the presence of different [KBr] and [CTAB] (cetyl‐trimethyl ammonium bromide) to gain more information about their stability, which can widen the area of their applications.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Screening for the Acid‐Catalyzed Hydrolysis of Some Hydrophobic Fe(II) Schiff Base Amino Acid Chelates and Reactivity Trends in the Presence of Alkali Halide and Surfactant

Nassr

Abu‐Dief

2015

Int J of Chemical Kinetics

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Kinetics of acid-catalyzed hydrolysis of some high-spin Fe(II) Schiff base amino acid complexes were followed spectrophotometrically at 298 K under pseudo-first-order conditions. The studied ligands were derived from the condensation of 5-bromosalicylaldehyde with different four amino acids (phenylalanine, aspartic acid, histidine, and arginine). The acid hydrolysis reaction was studied in aqueous media and in the presence of different concentrations of the alkali halide (KBr) and cationic surfactant (cetyl-trimethyl ammonium bromide, CTAB). The general rate equation was suggested to be rate = k obs [complex], where k obs = k 2 [H + ]. The increase in [KBr] enhances the reactivity of the reaction, and the addition of CTAB to the reaction mixture accelerates the reaction reactivity. The obtained kinetic data were used to determine the values of δ m G # (the change in the activation barrier) for the studied complexes when transferred from "water to water containing different [KBr]" and from "water to water containing altered [CTAB]

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Kinetics of reactions of Schiff base complexes of iron(II). V. Reactions of the complex of the hexadentate ligand NN‴‐bis‐[α‐(2‐pyridyl)benzylidene]triethylenetetramine in acid solution and with hydroxide, cyanide, and peroxodisulphate

Cited by 15 publications

References 35 publications

Kinetics of acid hydrolysis and reactivity of some antibacterial hydrophilic iron(II) imino-complexes

Kinetics of acid hydrolysis and reactivity of some antibacterial hydrophilic iron(II) imino-complexes

Equilibria in complexes ofN-heterocyclic molecules, Part XV+. Intermediates in the reaction of cyanide with transition metal tris complexes of 1,10-phenanthroline, 5-nitro-1,10-phenanthroline and 2,2'-bipyridyl

Kinetic Screening for the Acid‐Catalyzed Hydrolysis of Some Hydrophobic Fe(II) Schiff Base Amino Acid Chelates and Reactivity Trends in the Presence of Alkali Halide and Surfactant

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