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Titre du document / Document title

Kinetics of alkaline hydrolysis of organic esters and amides in neutrally-buffered solution

Auteur(s) / Author(s)

ROBINSON B. A. (1) ; TESTER J. W. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Los Alamos National Laboratory, Los Alamos NM, ETATS-UNIS

Résumé / Abstract

Reaction rare constants for the hydrolysis of organic esters and amides were determined at temperatures of 100-240°C in aqueous solutions buffered at pH values between 5.5 and 7.3. Experiments are modeled assuming alkaline hydrolysis with a thermodynamic solution model included to account for the temperature dependence of hydroxide ion concentration. In most cases, the ester hydrolysis second order rate constants agree well with publishes values from experiments in strongly basic solutions at pH values from 11 to 14 and temperatures from 25-80°C, despite the large extrapolations required to compare the data sets. The amide hydrolysis rate constants are about one order of magnitude higher than the extrapolated results from other investigators, but the reaction rate increased proportionally with hydroxide ion concentration, suggesting that an alkaline hydrolysis mechanism and can be used to predict hydrolysis reaction rates in neutrally-buffered solutions such as many groundwater and geothermal fluids

Revue / Journal Title

International journal of chemical kinetics    ISSN  0538-8066   CODEN IJCKBO 

Source / Source

1990, vol. 22, no5, pp. 431-448 (17 ref.)

Langue / Language

Anglais

Editeur / Publisher

Wiley, New York, NY, ETATS-UNIS  (1969) (Revue)

Mots-clés anglais / English Keywords

Hydrolysis

;

Buffer solution

;

Arrhenius equation

;

Thermodynamic properties

;

Rate constant

;

Medium effect

;

Temperature

;

Aliphatic compound

;

Saturated compound

;

Carboxamide

;

Mots-clés français / French Keywords

Hydrolyse

;

Solution tampon

;

Equation Arrhenius

;

Propriété thermodynamique

;

Constante vitesse

;

Effet milieu

;

Température

;

Composé aliphatique

;

Composé saturé

;

Carboxamide

;

Acide alcanoïque,ester alkyle

;

Acétamide

;

Benzamide

;

Mots-clés espagnols / Spanish Keywords

Hidrólisis

;

Solución de amortiguación

;

Ecuación Arrenio

;

Propiedad termodinámica

;

Constante velocidad

;

Efecto medio

;

Temperatura

;

Compuesto alifático

;

Compuesto saturado

;

Carboxamida

;

Localisation / Location

INIST-CNRS, Cote INIST : 15249, 35400000811696.0010

Nº notice refdoc (ud4) : 6840726



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