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cis–trans Isomerism among the Octahedral Diaquabis(optically active C-substituted ethylenediamine)nickel(II) Complexes and Their Thermal Reaction Products. An Explanation for a Variety in Colors and Stereochemistry of Lifschitz Complexes
- フォーマット:
- 論文
- 責任表示:
- Ihara, Yoshinori ; Sakino, Tomomi ; Ishikawa, Mieko ; Koyata, Takanori
- 言語:
- 英語
- 出版情報:
- 日本化学会=The Chemical Society of Japan, 1997-01-01
- 著者名:
- 掲載情報:
- Bulletin of the Chemical Society of Japan
- ISSN:
- 0009-2673
- 巻:
- 70
- 通号:
- 12
- 開始ページ:
- 3025
- 終了ページ:
- 3029
- バージョン:
- publisher
- 概要:
- The solid-phase thermal reactions of trans-diaquabis(diamine)nickel(II) complexes (trans-[Ni(diamine)2(H2O)2]X2) were investigated by means of TG/DTA and DSC, and high-temperature electronic spectrometry, where the diamine is an optically active diamine such as (1S,2S)-1,2-diphenyl-1,2-ethanediamine or (S)-4-methyl-1,2-pentanediamine, and X is Cl−, Br−, or NO3−. Several complexes were peculiarly transformed into cis-[NiX2(diamine)2] upon … thermal deaquation-anation, and then isomerized to trans-[NiX2(diamine)2] upon further heating. The results were in contrast to the reactions of the complexes with the corresponding racemic diamines which underwent a simple deaquation-anation, retaining an original trans configuration. The differences must come from a slight difference in the conformation of diamine ligands between trans-[Ni(R-diamine)(S-diamine)(H2O)2]X2 which is obtained for the rac-diamines and trans-[Ni(R- or S-diamine)2(H2O)2]X2 which is obtained for the optically active diamines. 続きを見る
- URL:
- http://hdl.handle.net/2297/37514
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