Kinetic study of the nitrosation of 1,3-dialkylureas in aqueous-perchloric acid medium

2004 ◽  
Vol 36 (5) ◽  
pp. 273-279 ◽  
Author(s):  
Guillermo González-Alatorre ◽  
Salvador H. Guzmán-Maldonado ◽  
Eleazar M. Escamilla-Silva ◽  
Guadalupe Loarca-Piña ◽  
Carlos Hernández Benítez
Keyword(s):  
Kinetic Study ◽  
Acid Medium ◽  
Perchloric Acid ◽  
Aqueous Perchloric Acid

Kinetics and Mechanism of the Autocatalyzed Oxidation of Theophylline by Permanganate in Aqueous Perchloric Acid Medium

2012 ◽  
Vol 41 (4) ◽  
pp. 567-580 ◽  
Author(s):  
Rajeshwari V. Hosahalli ◽  
Anita P. Savanur ◽  
Sharanappa T. Nandibewoor ◽  
Shivamurti A. Chimatadar
Keyword(s):  
Acid Medium ◽  
Perchloric Acid ◽  
Kinetics And Mechanism ◽  
Aqueous Perchloric Acid

Acid–base behaviour of the ferricyanide ion in perchloric acid media. Spectrophotometric and kinetic study

1990 ◽  
Vol 68 (2) ◽  
pp. 228-235 ◽  
Author(s):  
Pedro L. Domingo ◽  
Begoña García ◽  
José M. Leal
Keyword(s):  
Kinetic Study ◽  
Perchloric Acid ◽  
Decomposition Reaction ◽  
Acid Base ◽  
Acid Media ◽  
Protonation Equilibria ◽  
Aqueous Perchloric Acid ◽  
Protonated Species ◽  
Heterolytic Dissociation ◽  
Homolytic Dissociation

A wide study was carried out of the acid–base behaviour of ferricyanide ions in aqueous perchloric acid media in the range 0.1–11.5 M. This study shows that protonation and decomposition of the ferricyanide ions occur simultaneously. The three successive protonation equilibria were found in the acidity ranges 0.1–4.0, 3.5–8.5, and 7.0–11.5 M HClO4, respectively. A kinetic study was also made of the decomposition reaction at 60 °C. The kinetic data are explained by considering a reaction mechanism involving homolytic and heterolytic dissociation steps. The homolytic and heterolytic rate constants corresponding to each of the four protonated species were determined, along with the acid–base protonation constants, pK1 = −6.25 ± 0.10; pK2 = −3.23 ± 0.03; and pK3 = −0.60 ± 0.02. Keywords: acid–base behaviour, protonated species, decomposition, homolytic dissociation, heterolytic dissociation.

scholarly journals Substrate Inhibition in Ruthenium(III) Catalyzed Oxidation of Propane-1,3-diol by Periodate in Acidic Medium: A Kinetic Study

2020 ◽  
Vol 32 (7) ◽  
pp. 1569-1575
Author(s):  
K.V.S. Koteswara Rao ◽  
R. Venkata Nadh ◽  
K. Venkata Ratnam
Keyword(s):  
Acid Medium ◽  
Perchloric Acid ◽  
Acidic Medium ◽  
Reaction Rate ◽  
Substrate Inhibition ◽  
Potassium Periodate ◽  
First Order ◽  
Plausible Mechanism ◽  
Aqueous Perchloric Acid ◽  
Catalyzed Oxidation

Ruthenium(III) catalyzed oxidation of propane-1,3-diol by potassium periodate was studied in aqueous perchloric acid medium. Orders of reaction with respect to concentrations of oxidant, substrate, acid and catalyst were determined. First order in oxidant and catalyst concentrations, and inverse fractional order in acid medium were observed. In addition, substrate inhibition (i.e. a decrease in reaction rate with an increase in substrate concentration) was observed. Effect of addition of salt and solvent was studied. Based on the studies of temperature variation, Arrhenius parameters were calculated. Plausible mechanism was also proposed based on observed kinetics.

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