Dynamic NMR as a nondestructive method for the determination of rates of dissociation. III. Ionic dissociation of .ALPHA.-chlorodibenzyl sulfide.

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概要

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• Rates of dissociation of α-chlorodibenzyl sulfide have been determined by dynamic NMR technique. Examination of the rates at various concentrations of chloroform-<I>d</I> solutions has confirmed that the rates are not dependent on concentration, thus establishing that the NMR measurement affords data of unimolecular dissociation. The salt effect seems to be very small since addition of tetraethylammonium bromide hardly affects the rates of dissociation. Rates of dissociation in <I>o</I>-dichlorobenzene are smaller than in chloroform-<I>d</I>. The main contribution to the decrease in rates is given by the increase in enthalpy of activation, indicating that the hydrogen-bonding ability of chloroform is favorable for ionic dissociation.

• 公益社団法人 日本化学会の論文

著者

• Oki Michinori

  Department Of Chemistry Faculty Of Science Okawama University Of Science

• Nakamura Nobuo

  Department Of Cardiology Seiyu Memorial Hospital

• Shimizu Atsushi

  Department Of Chemistry College Of Science And Engineering Aoyama Gakuin University

• Kihara Hiroshi

  Department of Chemistry, Faculty of Science, The University of Tokyo

• Kihara Hiroshi

  Department of Chemistry, Faculty of Scienc, The University of Tokyo

• Sakamaki Yoshitaka

  Department of Chemistry, Faculty of Science, The University of Tokyo

• Azuma Kazufumi

  Department of Chemistry, Faculty of Science, The University of Tokyo

• Shimizu Atsushi

  Department of Chemistry, Faculty of Science, The University of Tokyo

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