【摘要】 本文用核磁共振法研究了位移试剂 Eu（fod）₃与二苯并-18-冠-6的相互作用.根据观察化学位移的数据求得了逐级平衡常数值和各纯组分的化学位移值.着重分析了 OCH₂质子 NMR 峰在[R_o]/[S_]>1.3时发生分裂现象,指出分裂原因是在 R₂S 配合物中,在 AA′位配位的几率与 BB′位配位几率不同.更多还原

【Abstract】 Interaction between di-benzo-18-crown-6 and Eu（fod）₃ has been investigated.The coordination effect of di-benzo-18-crown-6 with Eu （fod）₃ is different from that of18-c-6 because of the different symmestry and structure.The chemical shift ef NMR ofthe system were measured as function of concentration.Analysis of shifts lead to valuesof the equilibrium constants.It is showed that each all coordination probablities of thesix oxygen atoms of di-benzo-18-c-6 are close to each other in complex RS.In complexR₂S the coordination probablity of AA’ site is different from that of BB’ site.更多还原