研究了 (CH3 C5H4 ) 3 Ln·THF (Ln =Sm ,Ho ,Tb ,Yb)与环戊二烯高产率生成 (C5H5) 3 Ln·THF的新反应 .反应产物经过了元素分析、质谱和X射线的表征 .产物 (C5H5) 3 Ln·THF的特征结构参数 ,如五元碳环的碳原子与中心金属的平均距离 ,五元碳环质心与中心金属距离 ,配位的四氢呋喃氧原子与中心金属距离 ,由于“镧系收缩现象” ,随着中心原子序数的增加而减小 . The new reaction of (CH3 C5H4) 3 Ln · THF (Ln = Sm, Ho, Tb, Yb) with high yield of cyclopentadiene (C5H5) 3 Ln · THF was studied.The elemental analysis, mass spectrometry and X Ray characterization of the product (C5H5) 3 Ln · THF characteristic structural parameters, such as five carbon ring carbon atoms and the average distance from the center of the metal, five carbon ring center and the center of the metal center distance, coordination of tetrahydrofuran oxygen atoms and the center Metal distance, due to “lanthanide shrinkage,” decreases with increasing central atomic number.