Osmium(VIII) catalysed oxidation of l-leucine by a new oxidant, diperiodatoargentate(III) in aqueous alkaline medium

Seregar, Veeresh; Veeresh, T. M.; Nandibewoor, Sharanappa T.

doi:10.1016/j.molcata.2007.03.007

Cited by 13 publications

(2 citation statements)

References 20 publications

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“…[5] [6] have been used incorporation with transition metal ions like Osmium(VIII), Iridium(III), Ruthenium(VIII), etc. [7] [8] [9] for oxidation of var-ious compounds. The kinetics of redox reactions involving such catalysts and oxidants has been extremely investigated.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Study of Ruthenium(III) Catalyzed Oxidation of Cyclohexanone by Acidic Bromate

Lone¹,

Kaloo²,

Khaleel³

2018

JSEMAT

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In this work, kinetics and mechanism of Ru(III) catalyzed oxidation of cyclohexanone by acidified solution of potassium bromate has been studied. Present study employ mercuric acetate Hg (OAc) 2 as a scavenger for Br − ion to prevent parallel oxidation by bromine. The kinetics and mechanism have also been studied in the temperature range of 30˚C-45˚C. The reaction exhibits first order kinetics with respect to Ru (III), while zero order kinetics with respect to KBrO 3 and HClO 4. The influence of Hg(OAc) 2 and ionic strength on the rate of reaction was found to be insignificant. Positive effect in the reaction mixture was also observed upon addition of chloride ion; while as the negative effect was revealed with acetic acid. A suitable mechanism in conformity with the kinetic observations has been proposed and the rate law is derived on the basis of obtained data. The various activation parameters such as energy of activation (ΔE*), Arrhenius factor (A), entropy of activation (ΔS*) were calculated from the rate measurements at 30˚C, 35˚C-40˚C and 45˚C.

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Section: Introductionmentioning

confidence: 99%

Mechanistic Study of Ruthenium(III) Catalyzed Oxidation of Cyclohexanone by Acidic Bromate

Lone¹,

Kaloo²,

Khaleel³

2018

JSEMAT

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“…The surfactants may interact with proteins directly by competing for oil-water or air-water interfaces and binding to them, thereby leading to substantial changes in the protein conformation, alterations in the molecular characteristics to globular proteins and thus may lead to changes in their ability to bind other molecules, that is, they may selfassociate and be absorbed at interfaces thus altering their functional characteristics. Although extensive literature is available on the oxidation of amino acids, [1][2][3][4] several details in the mode of interactions of surfactants with proteins are still unanswered. Therefore, it is very important to understand the origin and nature of protein surfactant interactions both quantitatively and qualitatively.…”

Section: Introductionmentioning

confidence: 99%

Impact of Micelle Media on the Kinetics of Oxidation of l-Lysine (An Essential Amino Acid) by N-Bromophthalimide

Katre¹,

Goyal²,

Singh³

2013

Journal of Dispersion Science and Technology

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The effect of cationic surfactant cetyltrimethylammonium bromide (CTAB) on the oxidation of L-lysine by N-bromophthalimide (NBP) has been studied at 308 K. The reaction exhibits first order dependence on NBP and L-lysine and negative and fractional order dependence on HClO 4 . The effects of KCl, KBr, phthalimide, mercuric acetate, and dielectric constant of the medium have also been studied and summarized. CTAB strongly catalyzes the reaction and typical k obs and CTAB profile was observed, that is, with a progressive increase in CTAB, the reaction rate increased and after achieving a peak k obs decreased at higher concentrations of CTAB. The results are treated quantitatively in terms of 'Menger-Portnoy' and 'Piszkiewicz' models. The various activation parameters in presence and absence of CTAB have been also evaluated. A suitable mechanism consistent with the experimental findings has been proposed. The rate constant in micellar phase k M , cooperativity index (n) and binding constant have been computed.

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Mechanistic study of [RuCl3(H2O)2OH]− catalyzed oxidation of l-leucine by acidic N-bromophthalimide

Jain¹,

Singh²,

Negi³

2015

J IRAN CHEM SOC

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Osmium(VIII) catalysed oxidation of l-leucine by a new oxidant, diperiodatoargentate(III) in aqueous alkaline medium

Cited by 13 publications

References 20 publications

Mechanistic Study of Ruthenium(III) Catalyzed Oxidation of Cyclohexanone by Acidic Bromate

Mechanistic Study of Ruthenium(III) Catalyzed Oxidation of Cyclohexanone by Acidic Bromate

Impact of Micelle Media on the Kinetics of Oxidation of l-Lysine (An Essential Amino Acid) by N-Bromophthalimide

Mechanistic study of [RuCl3(H2O)2OH]− catalyzed oxidation of l-leucine by acidic N-bromophthalimide

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