Proton magnetic resonance spectra of metal ammine complexes. VI. The trans-effect in cobalt(III) amine compounds as studied by the rate of hydrogen-deuterium exchange.
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概要
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The rate of the isotopic deuterium exchange has been measured for several cobalt(III) amine complexes in D<SUB>2</SUB>O. The substituents CN<SUP>−</SUP>, NO<SUB>2</SUB><SUP>−</SUP>, and possibly SO<SUB>3</SUB><SUP>2−</SUP> decelerate the exchange of the amine protons <I>trans</I> to these ligands, leading in some cases to a smaller rate for these protons than for the <I>cis</I> ones. On the other hand, the <I>trans</I>-proton labilizing ligands include F<SUP>−</SUP>, Cl<SUP>−</SUP>, Br,<SUP>−</SUP>, H<SUB>2</SUB>O, CO<SUB>3</SUB><SUP>2−</SUP>, OCONH<SUB>2</SUB><SUP>−</SUP>, N<SUB>3</SUB><SUP>−</SUP>, CH<SUB>3</SUB>NH<SUB>2</SUB>, CH<SUB>3</SUB>COO<SUP>−</SUP>, and the malonate, fumarate, and oxalate ions. The above observation clearly indicates that the HD exchange rate can be a measure of the <I>trans</I>-effect of these ligand molecules.
- 公益社団法人 日本化学会の論文
著者
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YONEDA Hayami
Department of Chemistry, Faculty of Science, Hiroshima University
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Maeda Koichi
Department Of General Medicine And Clinical Investigation Nara Medical University
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Sakaguchi Ushio
Department of Chemistry, Faculty of Science, Hiroshima University
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Maeda Koichi
Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine
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Maeda Koichi
Department of Chemistry, Faculty of Science, Hiroshima University
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