利用二维核磁共振方法研究取代茚基金属钛、锆配合物的空间结构

Study of Steric Structures of Substituted Indenyl Titanium and Zirconium Complexes Using Two Dimensional NMR Spectra

通过1H 1HTOCSY和1H 1HNOESY谱对一系列新型结构的取代茚基钛、锆配合物进行了结构上的解析 .并由此发现夹心结构的锆配合物中 ,两个茚环 (或茚环和茂环 )以及茚环上的取代基之间存在核的Overhauser效应 ,这对于茚环相对空间结构的判断提供了有效的证据 .

The 1H- 1H TOCSY and 1H- 1H NOESY were used to study the structures of a series of substituted-indenyl titanium and zirconium complexes. It is found that there is nuclear Overhauser effect between the hydrogens of the two independent indenyl ligands in the sandwich complexes, which provides efficient evidences for the determination of the relative steric structure of the two indenyl ligands. Thus we suggest that the 1H- 1H NOESY dimension spectra could be an effective method to investigate the steric structures of the metallocene complexes.