Reversible, mixed first- and second-order and autocatalytic reactions as particular cases of a single kinetic rate law

1993 ◽  
Vol 97 (20) ◽  
pp. 5321-5326 ◽  
Author(s):  
D. Lavabre ◽  
V. Pimienta ◽  
G. Levy ◽  
J. C. Micheau
Keyword(s):  
Second Order ◽  
Kinetic Rate ◽  
Rate Law ◽  
Autocatalytic Reactions

The kinetic rate law for autocatalytic reactions

1987 ◽  
Vol 64 (11) ◽  
pp. 925 ◽  
Author(s):  
Fernando Mata-Perez ◽  
Joaquin F. Perez-Benito
Keyword(s):  
Kinetic Rate ◽  
Rate Law ◽  
Autocatalytic Reactions

PLATELET AGGREGATION DOES NOT CONFORM TO SIMPLE PARTICLE COLLISION THEORY

1987 ◽  
Author(s):  
Moideen P Jamaluddin
Keyword(s):  
Platelet Aggregation ◽  
Rate Equation ◽  
Rate Constants ◽  
Kinetic Scheme ◽  
Order Type ◽  
Second Order ◽  
Particle Collision ◽  
Collision Theory ◽  
Rate Law ◽  
First Order

Platelet aggregation kinetics, according to the particle collision theory, generally assumed to apply, ought to conform to a second order type of rate law. But published data on the time-course of ADP-induced single platelet recruitment into aggregates were found not to do so and to lead to abnormal second order rate constants much larger than even their theoretical upper bounds. The data were, instead, found to fit a first order type of rate law rather well with rate constants in the range of 0.04 - 0.27 s-1. These results were confirmed in our laboratory employing gelfiltered calf platelets. Thus a mechanism much more complex than hithertofore recognized, is operative. The following kinetic scheme was formulated on the basis of information gleaned from the literature.where P is the nonaggregable, discoid platelet, A the agonist, P* an aggregable platelet form with membranous protrusions, and P** another aggregable platelet form with pseudopods. Taking into account the relative magnitudes of the k*s and assuming aggregation to be driven by hydrophobic interaction between complementary surfaces of P* and P** species, a rate equation was derived for aggregation. The kinetic scheme and the rate equation could account for the apparent first order rate law and other empirical observations in the literature.

Comparison of the kinetic rate law parameters for the dissolution of natural and synthetic autunite in the presence of aqueous bicarbonate ions

2013 ◽  
Vol 351 ◽  
pp. 299-309 ◽  
Author(s):  
Ravi K.P. Gudavalli ◽  
Yelena P. Katsenovich ◽  
Dawn M. Wellman ◽  
Melina Idarraga ◽  
Leonel E. Lagos ◽  
...  
Keyword(s):  
Kinetic Rate ◽  
Rate Law ◽  
Bicarbonate Ions ◽  
Natural And Synthetic

scholarly journals Origins of Deviations from Transition-State Theory: Formulating a New Kinetic Rate Law for Dissolution of Silicates

2003 ◽  
Author(s):  
David London ◽  
G B Morgan ◽  
J P Icenhower ◽  
B P McGrail ◽  
A Luttge
Keyword(s):  
Transition State ◽  
Transition State Theory ◽  
State Theory ◽  
Kinetic Rate ◽  
Rate Law

Nachbargruppeneffekte bei der Aminolyse von Estern, II Die Aminolyse von 2-(2-Hydroxybenzyl)phenylacetaten / Neighboring Group Effects in the Aminolysis of Esters, II The Aminolysis of 2-(2-Hydroxybenzyl)phenylacetates

1978 ◽  
Vol 33 (4) ◽  
pp. 439-449 ◽  
Author(s):  
Volker Böhmer ◽  
Klaus Wörsdörfer
Keyword(s):  
Second Order ◽  
Phenyl Acetate ◽  
Third Order ◽  
Neighboring Group ◽  
Rate Law ◽  
Order Rate ◽  
Methyl Phenyl ◽  
Group Effects

Abstract The aminolysis of 2-(2-hydroxybenzyl)phenyl acetates with n-butylamine in dioxane is much faster than for the corresponding 2-(2-methoxybenzyl)phenyl acetates or 2-methyl-phenyl acetates. The kinetic results can be explained by two equivalent mechanisms. Both of them include the formation of a 1:1-complex between 2-(2-hydroxybenzyl)phenyl acetate and n-butylamine which is formed in an equilibrium. The reaction of this complex according to a second order rate law seems to be more probable than the reaction of the free ester according to a third order rate law.

Affinity Rate Law Failure to Describe Sodium Borosilicate Glass Alteration Kinetics

2003 ◽  
Vol 807 ◽  
Author(s):  
P. Frugier ◽  
S. Gin ◽  
C. Jégou
Keyword(s):  
Borosilicate Glass ◽  
Chemical System ◽  
High Level Waste ◽  
Critical Examination ◽  
Sodium Borosilicate Glass ◽  
Kinetic Rate ◽  
Rate Law ◽  
Passionate Debate ◽  
Experimental Findings ◽  
High Level

ABSTRACTSimplified glass compositions were chosen to improve our knowledge of the alteration kinetics of complex glasses dedicated to the confinement of high-level waste. Since 1998, the sodium borosilicate glass system is at the center of a passionate debate between an affinity-based kinetic rate law and a protective surface layer theory. All the authors who have investigated ternary 68/14/18 SiO2–B2O3–Na2O glass agree on the fact that the affinity law cannot satisfactorily account for its alteration kinetics. Some authors explained that these discrepancies between classical kinetic rate law and experimental findings could be due to macromolecular amorphous separation in the 68/14/18 sodium borosilicate system and that this simplified glass could be divided into 90% reedmergnerite (NaBSi3O8) and 10% diborate (Na2O–2B2O3). This article provides evidence of the homogeneity of ternary 68/18/14 SiO2–B2O3–Na2O glass at nanometric scale and shows that even phase separation at less than nanometric scale could not explain the inability of hydrated glass-solution affinity laws to describe its alteration. The relative simplicity of the SiO2–B2O3–Na2O chemical system allows a critical examination of the macroscopic alteration laws developed over the last twenty years based only on the hydrated glass-solution chemical affinity without taking into account the formation and reactivity of the gel or its passivating properties.

The oxidation of alcohols by sodium ruthenate

1984 ◽  
Vol 62 (9) ◽  
pp. 1835-1839 ◽  
Author(s):  
Donald G. Lee ◽  
Ligaya N. Congson ◽  
Udo A. Spitzer ◽  
Merle E. Olson
Keyword(s):  
Kinetic Rate ◽  
Rate Law ◽  
Oxidation Of Alcohols

The oxidation of 2-propanol and cyclobutanol by stoichiometric amounts of sodium ruthenate has been studied. Contrary to previously published speculations, it has been found that these reactions are not initiated by traces of perruthenate present as a contaminant in the ruthenate solutions. This conclusion is supported by both the kinetic rate law for the reaction and the products obtained from the oxidation of alcohols that would be expected to react differently with [Formula: see text] and [Formula: see text].

The Kinetic Rate Law for the Autocatalytic Growth of Citrate-Stabilized Silver Nanoparticles

2015 ◽  
Vol 47 (6) ◽  
pp. 351-360 ◽  
Author(s):  
Andriy Kytsya ◽  
Liliya Bazylyak ◽  
Yuriy Hrynda ◽  
Andriy Horechyy ◽  
Yuriy Medvedevdkikh
Keyword(s):  
Silver Nanoparticles ◽  
Kinetic Rate ◽  
Rate Law ◽  
Autocatalytic Growth
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