二次元相関分析法によるオルトブロムアニリンのNMRに対する溶媒効果の研究(第1報)

抄録

Proton magnetic resonance spectra of ortho-bromoaniline in various solvents were observed. Concentration dependences upon the proton chemical shifts were examined. Dilution coefficients (Δδ/Δc), which arose from the concentration dependences, were obtained by assuming linear relationships betwwen shift and concentration. Solvent effects were discussed in detail by examining correlativities between the dilution coefficients to proton and between those to solvent by means of the correlation analysis. It was found that solvent effects on the chemical shifts of each ring proton were successfully accounted for by considering chiefly the two terms of contributions which arose from aromatic solvent-induced shifts (ASIS) and substituent-solvent interaction. It was concluded that the two dimensional correlation analysis was a useful method to discuss the solvent effect on each ring proton of the aromatic compound when the small shifts were induced by only change of concentration.