<SUP>55</SUP>Mn Nuclear Magnetic Resonance Studies of the Compounds with Manganese-Tin Bonds
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概要
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The nature of Mn–Sn bonds has been studied by <SUP>55</SUP>Mn-NMR and IR spectroscopies of a series of compounds, R<SUB>3−<I>x</I></SUB>X<I><SUB>x</SUB></I>Sn–Mn(CO)<SUB>5</SUB>, where R is C<SUB>6</SUB>H<SUB>5</SUB> or CH<SUB>3</SUB> and where X is Cl or Br. Molecular orbital considerations have shown that the chemical shift of the <SUP>55</SUP>Mn-NMR spectra is a measure of the σ-polarity of the L–Mn bond in L–Mn(CO)<SUB>5</SUB>-type complexes, and that the linewidth is mainly determined by the π-interaction between Mn and Sn. The π-interaction (back-donation from Mn to Sn) seems to be most pronounced in Br<SUB>3</SUB>Sn–Mn(CO)<SUB>5</SUB> in the series of (CH<SUB>3</SUB>)<SUB>3−<I>x</I></SUB>Br<I><SUB>x</SUB></I>Sn–Mn(CO)<SUB>5</SUB> compounds. The relationships among the chemical shift, the wave numbers of CO stretching modes, and the eqQ, are also shown.
- 公益社団法人 日本化学会の論文
著者
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Miyamoto Takeshi
Department Of Cell Differentiation Sakaguchi Laboratory Of Developmental Biology Keio University Sch
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Onaka Satoru
Department Of Chemistry Nagoya Institute Of Technology
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Sasaki Yukiyoshi
Department of Chemistry and The Research Centre for Spectrochemistry, Faculty of Science, The University of Tokyo
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