CD spectra and absolute configurations of fac(a,b,c)-(Co(a)(b)(c)(1,4,7-triazacyclononane))n5+ complexes.
スポンサーリンク
概要
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Seventeen kinds of <I>fac</I>(<I>a</I>,<I>b</I>,<I>NH</I><SUB>3</SUB>)-[Co(a)(b)(NH<SUB>3</SUB>)(tacn)]<SUP><I>n</I>+</SUP> complexes (a, b=CN<SUP>−</SUP>, NO<SUB>2</SUB><SUP>−</SUP>, SO<SUB>3</SUB><SUP>2−</SUP>, NCS<SUP>−</SUP>, N<SUB>3</SUB><SUP>−</SUP>, CH<SUB>3</SUB>COO<SUP>−</SUP>, H<SUB>2</SUB>O, OH<SUP>−</SUP>, Cl<SUP>−</SUP>, or Br<SUP>−</SUP>; tacn=1,4,7-triazacyclononane) have been prepared and optically resolved by column chromatography. The absolute configurations of these complexes have been determined by referring to the CD spectra of the related [Co(a)(gly)(tacn)]<SUP><I>n</I>+</SUP> complexes (a=CN<SUP>−</SUP>, NO<SUB>2</SUB><SUP>−</SUP>, NCS<SUP>−</SUP>, N<SUB>3</SUB><SUP>−</SUP>, or Cl<SUP>−</SUP>). It has been found that the signs of the Cotton peaks observed in the first absorption band region are closely related to the ligand field strengths of the unidentate ligands, and that the dominant Cotton peak is associated with the electronic transition which arises in the plane containing no ammonia molecule.
- 公益社団法人 日本化学会の論文
著者
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Fujinami Shuhei
Department Of Chemical Science Graduate School Of Natural Science And Technology Kanazawa University
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Shibata Muraji
Department of Chemistry Faculty of Science Kanazawa University
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Hosokawa Takao
Department of Chemistry, Faculty of Science, Kanazawa University
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