Preparation and Circular Dichroism of <I>trans</I>(<I>N</I>) and <I>cis</I>(<I>N</I>) Isomers of (L- or D-Alaninate-<I>N</I>,<I>N</I>-diacetato)(amino-acidato)cobaltate(III) Complexes

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概要

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• Eight new complexes, <I>trans</I>(<I>N</I>) or <I>cis</I>(<I>N</I>) isomers of (L- or D-alaninate-<I>N</I>,<I>N</I>-diacetato) (aminoacidato)cobaltate(III) ions, have been synthesized as their potassium salts, where the amino acids are glycine, L-alanine and L-proline. Stereoselective formation of a limited number of the isomers with respect to the geometrical arrangement of the coordinated nitrogen and oxygen atoms and with respect to the position of the chelate ring containing the methyl group of the coodinated alaninate-<I>N</I>,<I>N</I>-diacetate ion, were confirmd from the results of the studies by ion-exchange column chromatography, proton magnetic resonance and circular dichroism spectra. The additivity of vicinal circular dichroism contributions from the two different optically active ligands in a complex has been discussed for the complexes without the configurational chirality.

• 公益社団法人 日本化学会の論文

著者

• Koine Norio

  Department Of Applied Chemistry Faculty Of Engineering Ehime University

• Shimura Yoichi

  Department of Chemistry Faculty of Science Osaka University

• Hidaka Jinsai

  Department of Chemistry Faculty of Science Osaka University

• Sakota Naokazu

  Department of Industrial Chemistry, Faculty of Engineering, Ehime University

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