Meerwein酯与苯相互作用的^1H NMR研究

THE ￣1H NMR STUDY OF MOLECULAR INTERACTIONS BETWEEN MEERWEIN'S ESTER AND BENZENE

测定了Ｍｅｅｒｗｅｉｎ酯（１，３，５，７，－四羧甲基二环［３，３，１］壬－２，６－二烯－２，６－二醇）在四氯化碳和苯混合溶剂中随苯的摩尔分数变化的１ＨＮＭＲ谱．观察到分子中两类不同的甲基的化学位移随苯的摩尔分数增加都逐渐移向高场，分子中不同位置上的甲基的化学位移向高场移动程度不同，原处低场的甲基的δ比原处高场甲基的δ要大，两条吸收峰在苯的摩尔数渐增时先是重合后又渐渐分开，所有化学位移可以用线性方程δ＝Ａ＋ＢＸ表示．

H NMR Meerwein's ester (1,3,5,7-tetracarbomethoxybicyclo [3, 3, 1] nona - 2, 6- diene-2,6-diol) (I) has been measured as a function of the mole fraction of benzene in the mixed solvent of bezene and caron tetrachloride. As the mole fraction of benzene in creases, the chemicalshifts (δ) of two different methyl groups in a molecule and of benzenegradually move upfield. The rate of upfield shifts of differently located methyl groups in a molecule differs from each other. The △δ of originally lowerfield methyl group is larger than that of originally upperfield methyl group, so the two resonance lines appear to overlap and cross over with the increment of the fraction of benzene in the mixed solvent. All of the chemical shifts can be related by a linear equation δ=A+BX, where, X is the mole fraction of benzene in the mixed solvent.