Induced circular dichroism spectra of some achiral and racemic cobalt(III)-amine complexes in aqueous (R,R)-tartrate and (R,R)-tartratoantimonate(III) solutions.
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概要
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The induced circular dichroism (ICD) spectra were measured in the first d-d transition region for the following cobalt(III)–amine complexes in aqueous solutions of (<I>R</I>,<I>R</I>)-tartrate and (<I>R</I>,<I>R</I>)-tartratoantimonate(III) anions; [Co(en)<I><SUB>n</SUB></I>(NH<SUB>3</SUB>)<SUB>6−2<I>n</I></SUB>]<SUP>3+</SUP> (<I>n</I>=0–3) and <I>cis</I>-[Co(en)<SUB>2</SUB>(RNH<SUB>2</SUB>)<SUB>2</SUB>]<SUP>3+</SUP> (<I>R</I>=methyl and ethyl). It was found that a single negative CD band was induced for all the complexes in (<I>R</I>,<I>R</I>)-tartrate solution, while a single positive one was induced for most of them in (<I>R</I>,<I>R</I>)-tartratoantimonate(III) solution; the ICD developed in it was composed of a single negative band for [Co(en)<SUB>3</SUB>]<SUP>3+</SUP> and of two bands with opposite sign for <I>trans</I>-[Co(en)<SUB>2</SUB>(NH<SUB>3</SUB>)<SUB>2</SUB>]<SUP>3+</SUP> and <I>cis</I>-[Co(en)<SUB>2</SUB>(EtNH<SUB>2</SUB>)<SUB>2</SUB>]<SUP>3+</SUP>. The ICD spectra obtained for racemic complexes were interpreted in terms of differential interactions of <I>Λ</I>- and <I>Δ</I>-enantiomers with (<I>R</I>,<I>R</I>)-tartrate or (<I>R</I>,<I>R</I>)-tartratoantimonate(III), and an attempt was made to correlate the sign of their ICD spectra with their chromatographic behavior on an SP-Sephadex ion-exchanger with these chiral anions as an eluent.
- 公益社団法人 日本化学会の論文
著者
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Oh Chang
Department Of Biochemistry And Ilchun Molecular Medicine Institute Mrc Seoul National University Col
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YONEDA Hayami
Department of Chemistry, Faculty of Science, Hiroshima University
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Miyoshi Katsuhiko
Department Of Chemistry Faculty Of Science Hiroshima University
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Nakazawa Hiroshi
Department Of Applied Biology Faculty Of Textile Science Kyoto Institute Of Technology
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