Matsukawa et al., Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1951, vol. 71, p. 477,479
作者:Matsukawa et al.
DOI:——
日期:——
Colthurst, Matthew J.; Williams, Andrew, Journal of the Chemical Society. Perkin Transactions 2 (2001), 1997, # 8, p. 1493 - 1497
作者:Colthurst, Matthew J.、Williams, Andrew
DOI:——
日期:——
Kinetics of the reaction of 4-nitrophenyl benzoates with 4-chlorophenol in the presence of potassium carbonate in dimethylformamide
作者:I. A. Os’kina、V. M. Vlasov
DOI:10.1134/s1070428006060091
日期:2006.6
The effect of the substituent in the benzoyl group on the relative rate and activation parameters of transesterification of substituted 4-nitrophenyl benzoates with 4-chlorophenol in dimethylformamide in the presence of potassium carbonate was studied by the competing reaction technique. The whole series of benzoates showed the enthalpy-entropy compensation effect. 4-Nitrophenyl benzoates having electron-acceptor substituents give rise to isokinetic relationship with an isokinetic temperature beta of 382 K. The mechanism of the transesterification process is discussed.
Kinetics of the reaction of substituted 4-nitrophenyl benzoates with benzenethiol in the presence of potassium carbonate in dimethylformamide
作者:I. A. Os’kina、V. M. Vlasov
DOI:10.1134/s1070428008040167
日期:2008.4
The effect of the substituent nature on the rate and activation parameters of transesterification of a series of 4-nitrophenyl benzoates with benzenethiol in dimethylformamide in the presence of potassium carbonate was studied by the competing reaction method. In all cases, change of the Gibbs energy of activation is determined mainly by variation of the enthalpy of activation. 4-Nitrophenyl benzoates having electron-withdrawing substituents in the benzoyl fragment were found to fit an isokinetic relation with an isokinetic temperature beta of 318 K. Enthalpy-entropy compensation effect was observed in the reactions with all the examined 4-nitrophenyl benzoates. The relation between the reactivity and polarizability of nucleophilic center in S- and O-nucleophiles is discussed.