Isolation and assignment of two isomers of trans(NO2)-dinitrobis-((S)-2-aminomethylpyrrolidine)cobalt(III) perchlorate.

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概要

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• Two possible isomers (trans,cis and trans,trans) of <I>trans</I>-(NO<SUB>2</SUB>)-[(Co(NO<SUB>2</SUB>)<SUB>2</SUB>(ampr)<SUB>2</SUB>]ClO<SUB>4</SUB> (ampr=(<I>S</I>)-2-aminomethylpyrrolidine) were isolated separately by fractional recrystallization. The dinitro complexes were converted to the corresponding <I>trans</I>(Cl,NO<SUB>2</SUB>)–[CoCl(NO<SUB>2</SUB>)(ampr)<SUB>2</SUB>]<SUP>+</SUP> complexes. Based on the circular dichroism and <SUP>13</SUP>C-NMR spectral data, it was shown that the less soluble dinitro complex gave the single isomer of the chloronitro complex, while the more soluble one yielded two diastereomeric chloronitro complexes. Thus, the former is assigned to the trans,cis configuration, and the latter to the trans,trans, taking the geometries of the complexes into consideration.

• 公益社団法人 日本化学会の論文

著者

• Yoshikawa Sadao

  Department Of Applied Chemistry Faculty Of Science And Technology Keio University

• Saburi Masahiko

  Department Of Applied Chemistry Saitama Institute Of Technology

• Yokowo Yasuhiko

  Department of Synthetic Chemistry, Faculty of Engineering, The University of Tokyo

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