Proton magnetic resonance spectra of metal ammine complexes. VIII. Hydrogen isotopic exchange in the [Co(O)2(N)4]+ complex ions.

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概要

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• The rates of amine hydrogen isotopic exchange in the [Co(O)<SUB>2</SUB>(N)<SUB>4</SUB>]<SUP>+</SUP> complex ions, where (O)<SUB>2</SUB> represents carbonate, oxalate, or malonate ions, and (N)<SUB>4</SUB>, tetraammine, bis(ethylenediamine), or bis(trimethylenediamine), were measured in D<SUB>2</SUB>O at 35 °C by the PMR technique. It was found that: (1) the rates for <I>trans</I> (to oxygen) amines are faster than those for <I>cis</I> amines; (2) the rates, especially for <I>trans</I> amines, in the carbonato complexes are slower than those in the oxalato and malonato analogs, and (3) the difference between the rates for <I>cis</I> and <I>trans</I> amines is smaller in the bis(diamine) complexes than in the tetraammine complexes. These results are discussed in terms of the influence of the chelate geometry in the complex on the exchange reaction.

• 公益社団法人 日本化学会の論文

著者

• YONEDA Hayami

  Department of Chemistry, Faculty of Science, Hiroshima University

• Sakaguchi Ushio

  Department of Chemistry, Faculty of Science, Hiroshima University

• Taura Toshiaki

  Department of Chemistry, Faculty of Science, Hiroshima University

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