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KMID : 1059519880320010048
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Journal of the Korean Chemical Society
1988 Volume.32 No. 1 p.48 ~ p.52
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A Kinetic Study of 2-Phenethyl p-Bromobenzenesulfonate with Substituted Pyridines Under High Pressure (II)
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Yoh Soo-Dong
Park Kyung-Hwan
Park Jong-Hwan
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Abstract
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Kinetics of the reaction of 2-phenethyl p-bromobenzenesulfonate with substituted pyridines in acetonitrile were investigated by an electric conductivity method at 1-2000 bars and 45∼55℃. The rates of these reactions were increased with raising temperatures, pressures and by changing electron-donating substitutents in pyridine. When raising pressure the Hammett reaction parameter ┃ρ┃ and Brφnsted β values were increased, and isokinetic temperature observed from isokinetic relations hip between ΔH≠ and ΔS≠ was decreased. These results indicate that the SN2 characters were increased with raising pressure.
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