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锗桥连茚及取代茚配体相继与丁基锂及ＺｒＣｌ４作用,生成锗桥连茚基及取代茚基锆化合物Ｍｅ２Ｇｅ(２－Ｒ１－４－Ｒ２－Ｉｎｄ)２ＺｒＣｌ２[Ｒ１＝Ｒ２＝Ｈ(１);Ｒ１＝Ｍｅ,Ｒ２＝Ｈ(２);Ｒ１＝Ｍｅ,Ｒ２＝Ｐｈ(３)]．化合物１－３均为内消旋和外消旋异构体的混合物,通过多次重结晶得到化合物１和２的纯外消旋异构体及化合物３的内消旋异构体．由元素分析和１Ｈ ＮＭＲ谱表征了化合物的分子结构．研究了在甲基铝氧烷(ＭＡＯ)的助催化下,化合物１－３对乙烯和丙烯聚合的催化性能．由锗桥连茚基化合物１－３得到的聚乙烯的分子量分布比一般茂金属催化剂略宽．内消旋和外消旋异构体的混合物(３)由于两个催化活性中心不等同而使得到的聚乙烯的分子量分布相当宽．外消旋异构体１和２催化丙烯聚合得到高等规聚丙烯．
Germanium bridged indene and substituted indene ligand successively reacted with butyllithium and ZrCl4 to form germanium bridged indenyl and substituted indenyl zirconium compounds Me2Ge (2-R1-4-R2-Ind) 2ZrCl2 [R1 = R2 = H R1 = Me, R2 = H (2); R1 = Me, R2 = Ph (3)]. Compounds 1-3 are both meso and racemic mixtures and pure racemic isomers of compounds 1 and 2 and meso isomers of compound 3 are obtained by multiple recrystallizations. The molecular structure of the compound was characterized by elemental analysis and 1H NMR spectrum. The catalysis of compound 1-3 on the polymerization of ethylene and propylene was studied under the catalysis of methylaluminoxane (MAO). The polyethylene obtained from the germanium bridged indenyl compound 1-3 has a somewhat broader molecular weight distribution than the general metallocene catalyst. Mixtures of meso and racemic isomers (3) The molecular weight distribution of the resulting polyethylene is rather wide due to the unequal two catalytically active centers. Racemic isomers 1 and 2 catalyze the polymerization of propylene to give higher isotactic polypropylene.