Reaction of 1-ethyl-3-methyl-4-imidazoline-2-thione with methyl iodide. Kinetic and thermodynamic aspects.

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概要

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• The reaction of 1-ethyl-3-methyl-4-imidazoline-2-thione with methyl iodide followed simple second order kinetics in polar solvents, whereas in less polar solvents the reverse process made a significant contribution to the overall rate. The solvent effects on the forward rate constant were linearly related to those on the rate of the reaction of tetramethylthiourea with methyl iodide. A plot of <I>ΔV</I><SUB>0</SUB><SUP>\neweq</SUP> <I>vs.</I> <I>Δ</I>\bar<I>V</I>° was linear with a slope of 0.33. From the volume changes and enthalpy changes measured, three transition state indices, (<I>Δ</I><SUB>2</SUB><I>V</I><SUP>\neweq</SUP>⁄<I>Δ</I><SUB>2</SUB>\bar<I>V</I>°), <I>n</I><SUB>T</SUB> and α were determined in acetonitrile, <I>ca.</I> 0.33, 0.32, and 0.41, respectively.

• 公益社団法人 日本化学会の論文

著者

• Yamada Tetsuya

  Department Of Agricultural Chemistry Faculty Of Bioresources Mie University

• Kondo Yasuhiko

  Department Of Anatomy Juntendo University School Of Medicine:(present Address)dpartment Of Basic Hum

• Kusabayashi Shigekazu

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

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