<SUP>119</SUP>Sn-Mössbauer and <SUP>1</SUP>H- and <SUP>55</SUP>Mn-NMR Spectroscopic Studies of a Series of Compounds, R<SUB>3−<I>x</I></SUB>X<I><SUB>x</SUB></I>Sn-Mn(CO)<SUB>5</SUB>

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概要

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• The electronic configuration around the tin atom for a series of organotin-manganese compounds, R<SUB>3−<I>x</I></SUB>X<I><SUB>x</SUB></I>Sn–Mn(CO)<SUB>5</SUB>, has been studied by <SUP>119</SUP>Sn-Mössbauer and <SUP>1</SUP>H- and <SUP>55</SUP>Mn-NMR spectroscopies. All the results obtained from these spectroscopic measurements show that the Mn(CO)<SUB>5</SUB> group is a stronger electron donor than the methyl, phenyl, or halogen group and that the tin-manganese bond prefers the sσ-character whereas the tin-halogen bond prefers the pσ-character. The relationship between the <SUP>55</SUP>Mn-chemical shift and the <SUP>119</SUP>Sn-isomer shift indicates some σ-electron withdrawal from manganese to tin. The phenyl group reduces the magnitude of quadrupole splitting more than the methyl group; this fact may be due to the mesomeric effect of the phenyl group through the π-bond between tin and ligand atoms. The relationship among the <SUP>119</SUP>Sn-isomer shift, the <SUP>1</SUP>H-chemical shift, and the coupling constant <I>J</I>(<SUP>119</SUP>Sn-<SUP>1</SUP>H(CH<SUB>3</SUB>)) is also shown.

• 公益社団法人 日本化学会の論文

著者

• Onaka Satoru

  Department Of Chemistry Nagoya Institute Of Technology

• Sasaki Yukiyoshi

  Department of Chemistry and The Research Centre for Spectrochemistry, Faculty of Science, The University of Tokyo

• Sano Hirotoshi

  Deparment of Chemistry, Faculty of Science, Tokyo Metropolitan University

• Sano Hirotoshi

  Department of Chemistry, Faculty of Science, Ochanomizu University

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