【摘要】 本文研究了15种新合成的单、双N取代二苯并18冠6的¹H及¹³C NMR谱。结果表明,¹³C NMR谱的化学位移能显示分子的电荷分布,而¹H NMR谱的偶合常数则部份地反映了大环的构象。氮原子的杂入大环结构和取代基的改变对聚醚环上的电荷分布影响的结果说明,这些改变可能会对冠醚的络合作用发生影响。更多还原

【Abstract】 1H and 13C NMR spectra of 15 firstly synthesized mono N-and Di N-sub-stituted dibenzo-18-crovrn-6 azacrown ethers were studied. The results show that chemical shifts 13C NMR spectra could display the charge distribution on the whole moleaule while coupling constants of 1H NMR spectra partly reflect the conformation of the polyether rings. The influence of N-atom substitution into the polyether ring and the change 0f its sabstitaents on the charge distribution show that these changes are table to influence the complexing atcion of these azacrown ethers.更多还原