Mechanistic studies of ruthenium(III)-catalyzed oxidation of <scp>DL</scp>-methionine by hexacyanoferrate(III) in an alkaline medium

Rao, B. Dharma; Sarathi, T. V. N. Partha; Nowduri, Annapurna; Vani, P.

doi:10.1080/17415993.2011.573558

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…A single spot for the prepared derivative, obtained on a chromatogram exhibit the formation of a single product. Earlier reports available on the oxidation of amino acids by various oxidizing agents also support the formation of α‐ketoglutaric acid 25–28 …”

Section: Resultsmentioning

confidence: 78%

“…Earlier reports available on the oxidation of amino acids by various oxidizing agents also support the formation of α-ketoglutaric acid. [25][26][27][28] The characteristic FTIR spectrum of the final product (α-ketoglutaric acid) exhibits absorption bands of 2540-3080, 1720, and ∼2900-2950 cm −1 corresponding to O-H stretching (COOH), C = O stretching and C-H stretching, respectively (Figure 1). Elemental analysis data: C, 41.14; H, 4.12; O, 54.74 also supports the formation of α-ketoglutaric acid as a final product.…”

Section: Kinetic Proceduresmentioning

confidence: 99%

“…Ru(III) is one of these metal ions that are particularly effective at oxidizing organic compounds when combined with hexacyanoferrate(III) 22 . There are numerous reports on the hexacyanoferrate(III)‐catalyzed oxidation of polyamino carboxylates, glycols, amines, amides, and sulfoxides by Ru(III) in an aqueous alkaline medium 25–28 . However, very few studies have been conducted on the metal‐catalyzed oxidation of organic moieties in a surfactant medium by hexacyanoferrate (III) 29,30 …”

Section: Introductionmentioning

confidence: 99%

“…22 There are numerous reports on the hexacyanoferrate(III)-catalyzed oxidation of polyamino carboxylates, glycols, amines, amides, and sulfoxides by Ru(III) in an aqueous alkaline medium. [25][26][27][28] However, very few studies have been conducted on the metal-catalyzed oxidation of organic moieties in a surfactant medium by hexacyanoferrate (III). 29,30 Our research team investigated the effect of an anionic surfactant on cyanide substitution using Fe(II) and Ru(II) cyano complexes.…”

Section: Introductionmentioning

confidence: 99%

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Effect of cationic surfactant on Ru(III) catalyzed L‐glutamic acid oxidation by hexacyanoferrate(III)

Srivastava

Goswami

Dohare

et al. 2023

Int J of Chemical Kinetics

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In CTAB micellar medium, the kinetic investigation of Ru(III) promoted oxidation of L‐glutamic acid (Glu) by [Fe(CN)6]3− was carried out by recording the decline in absorbance at 420 nm, which corresponds to [Fe(CN)6]3−. By adjusting one variable at a time, the progression of the reaction has been inspected as a function of [OH−], ionic strength, [CTAB], [Ru3+], [Glu], [Fe(CN)63−], and temperature using the pseudo‐first‐order condition. The findings demonstrate that [OH−], [CTAB], and [Glu] are the key parameters that have a discernible impact on reaction rate. In the studied concentration range of Ru(III), [Fe(CN)6]3−, and at lower [Glu] and [OH−], the reaction displays first‐order kinetics. The incremental trend in reaction rate with electrolyte concentration demonstrates a positive salt effect. CTAB substantially catalyzes the process, and after reaching a maximum, the rate remains nearly constant at increased [CTAB]. The observed decline in the CMC of CTAB may be caused by the reduced repulsion between the positively charged heads of the surfactant molecules caused by the negatively charged OH−, and [Fe(CN)6]3−. The activation parameters also support the outer‐sphere electron transfer mechanism as recommended by us.

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Section: Resultsmentioning

confidence: 78%

Section: Kinetic Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of cationic surfactant on Ru(III) catalyzed L‐glutamic acid oxidation by hexacyanoferrate(III)

Srivastava

Goswami

Dohare

et al. 2023

Int J of Chemical Kinetics

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Investigation of electron-transfer reaction between alkaline hexacyanoferrate(III) and ranitidine hydrochloride – a histamine H₂receptor antagonist, in the presence of homogenous ruthenium(III) catalyst

Jattinagoudar

Nandibewoor

Chimatadar

2015

Journal of Sulfur Chemistry

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A Kinetic and Mechanistic Study of Ir (III)-Catalyzed Oxidation of Methionine by HCF (III) in an Aqueous Alkaline Medium

Garg,

Rajput

2024

CPC

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Introduction: The kinetic study of Ir (III) chloride-catalyzed oxidation of methionine by hexacyanoferrate (abbreviated as HCF) III ions in aqueous alkaline medium was performed spectrophotometrically at constant ionic strength of 0.5 moldm-3 and temperature of 35±0.10C. Method: The progress of the reaction was found to be first-order rate dependence kinetics with respect to [HCF (III)], [OH-], and [IrCl3]. The rate of reaction was found to decrease with an increased concentration of methionine. The ionic strength of the reaction mixture showed a positive salt effect on the reaction rate. Different activation parameters were also evaluated by studying the reaction at four different temperatures. The stoichiometry of the reaction showed Methionine: HCF (III) = 1:4. Result: The oxidation product of the reaction was found to be methionine sulphone, which was identified by an organic solvent method and IR Spectroscopy. Further, a suitable mechanism was proposed to explain all the experimental results. Conclusion: It is assumed that the reaction proceeded through complex formation between substrate (abbreviated) and iridium trichloride. A rate law was derived, which verified the results. CH3-S-(CH2)2-CH (NH2)-COO- + 4HCF (III) Ir (III), H2O CH3-SO2-(CH2)2-CH- (NH2)-COO- + 4HCF (II) result: 1.Methionine sulphone was found to be the main product of oxidation was identified using an organic solvent method and IR Spectroscopy. A suitable mechanism has been proposed to explain all the experimental results. It is assumed that reaction proceeds through complex formation between substrate (abbreviated) and iridium trichloride. A rate law has been derived which verifies the results. CH3 –S-(CH2)2-CH (NH2) – COO- + 4HCF (III) □(→┴(Ir(III),H2O) ) CH3-SO2-(CH2)2-CH (NH2)-COO- + 4HCF (II) 2. Degradation kinetic is anticipated to follow the first order kinetics at lower concentration. 3. The catalytic system can be recycled and reused without loss of activity. 4. The anticipated easy recovery of catalyst from the reaction mixture shows another positive signigficance.

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Mechanistic studies of ruthenium(III)-catalyzed oxidation of DL-methionine by hexacyanoferrate(III) in an alkaline medium

Cited by 3 publications

References 8 publications

Effect of cationic surfactant on Ru(III) catalyzed L‐glutamic acid oxidation by hexacyanoferrate(III)

Effect of cationic surfactant on Ru(III) catalyzed L‐glutamic acid oxidation by hexacyanoferrate(III)

Investigation of electron-transfer reaction between alkaline hexacyanoferrate(III) and ranitidine hydrochloride – a histamine H₂receptor antagonist, in the presence of homogenous ruthenium(III) catalyst

A Kinetic and Mechanistic Study of Ir (III)-Catalyzed Oxidation of Methionine by HCF (III) in an Aqueous Alkaline Medium

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Mechanistic studies of ruthenium(III)-catalyzed oxidation of DL-methionine by hexacyanoferrate(III) in an alkaline medium

Cited by 3 publications

References 8 publications

Effect of cationic surfactant on Ru(III) catalyzed L‐glutamic acid oxidation by hexacyanoferrate(III)

Effect of cationic surfactant on Ru(III) catalyzed L‐glutamic acid oxidation by hexacyanoferrate(III)

Investigation of electron-transfer reaction between alkaline hexacyanoferrate(III) and ranitidine hydrochloride – a histamine H2receptor antagonist, in the presence of homogenous ruthenium(III) catalyst

A Kinetic and Mechanistic Study of Ir (III)-Catalyzed Oxidation of Methionine by HCF (III) in an Aqueous Alkaline Medium

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Investigation of electron-transfer reaction between alkaline hexacyanoferrate(III) and ranitidine hydrochloride – a histamine H₂receptor antagonist, in the presence of homogenous ruthenium(III) catalyst