TY - JOUR
T1 - Kinetics in phase-transfer catalysis
T2 - A theoretical study. Part 2. the method of initial rates
AU - Bar, Raphael
AU - De La Zerda, Jaime
AU - Sasson, Yoel
PY - 1984
Y1 - 1984
N2 - A theoretical study of a phase-transfer-catalysed irreversible S N2 reaction, RY + X- → RX + Y-, was undertaken in order to establish the necessary conditions for the application of the method of initial rates in phase-transfer catalysis. The system studied consists of a slow chemical reaction coupled to a fast anion exchange via an organic quaternary 'onium salt. An error in measuring the initial reaction rate was shown to be inherent in a system in which the released anion Y- is initially absent. This error is negligibly small when the selectivity extraction constant Kx/ysel ≥ 1 for equal reactant concentrations and when Kx/ysel ≥ 0.1 for a five-fold or more molar excess of concentration of the ionic reactant.
AB - A theoretical study of a phase-transfer-catalysed irreversible S N2 reaction, RY + X- → RX + Y-, was undertaken in order to establish the necessary conditions for the application of the method of initial rates in phase-transfer catalysis. The system studied consists of a slow chemical reaction coupled to a fast anion exchange via an organic quaternary 'onium salt. An error in measuring the initial reaction rate was shown to be inherent in a system in which the released anion Y- is initially absent. This error is negligibly small when the selectivity extraction constant Kx/ysel ≥ 1 for equal reactant concentrations and when Kx/ysel ≥ 0.1 for a five-fold or more molar excess of concentration of the ionic reactant.
UR - http://www.scopus.com/inward/record.url?scp=0002592558&partnerID=8YFLogxK
U2 - 10.1039/p29840001881
DO - 10.1039/p29840001881
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AN - SCOPUS:0002592558
SN - 1472-779X
SP - 1881
EP - 1884
JO - Journal of the Chemical Society, Perkin Transactions 2
JF - Journal of the Chemical Society, Perkin Transactions 2
IS - 11
ER -