Five new group 4 ansa-bridged permethylindenyl complexes with either a dimethylsilane bridge or a tetramethyldisilane bridge have been synthesised and fully characterised. These complexes were supported on a hydrocarbon insoluble polymethylaluminoxane (sMAO) and their slurry-phase ethylene polymerisation performance was investigated. The highest activity was achieved using ${}^{{\mathrm{M}\mathrm{e}}_2}\mathrm{S}\mathrm{B}$(Cp^Me,I*)Zr(CH₂SiMe₃)₂ (8042 kg_PE mol_Zr^–1 h^–1 bar^–1 at 60 °C) but a decrease in activity was observed with an increase in the length of the bridge. DSC analysis of the polymers revealed the production of HDPE with minimal branching and defects, while SEM showed the production of polymer particles with commercially desirable uniform, ‘popcorn’, morphology. GPC analysis showed the production of polyethylenes with M_w < 570 kg mol^–1 at 80 °C. In addition, ${}^{{\mathrm{M}\mathrm{e}}_2}\mathrm{S}\mathrm{B}$(Cp,I*)Zr(CH₂SiMe₃)₂ was immobilised on MAO modified layered double hydroxide (LDHMAO). The slurry-phase polymerisation activity of ${}^{{\mathrm{M}\mathrm{e}}_2}\mathrm{S}\mathrm{B}$(Cp,I*)Zr(CH₂SiMe₃)₂ on this support system was similar to the sMAO support; however, the polymer morphology was much less uniform.

五个新组4的柄-bridged permethylindenyl配合物或者是二甲基硅烷桥或四甲基乙硅烷桥已被合成并充分表征。这些配合物负载在不溶于烃的聚甲基铝氧烷（sMAO）上，并研究了它们的淤浆相乙烯聚合性能。最高的活性是通过使用${}^{{\mathrm{中号}\mathrm{Ë}}_{\mathrm{2个}}}\mathrm{小号}\mathrm{乙}$（Cp ^Me，I *）Zr（CH ₂ SiMe ₃）₂（8042 kg _PE mol _Zr ^–1  h ^–1  bar ^–1在60°C下），但是随着桥长度的增加，活性降低。DSC对聚合物的分析表明，生成的HDPE具有最小的分支和缺陷，而SEM显示的聚合物具有商业上所需的均匀“爆米花”形态。GPC分析表明，在80°C下，M _w <570 kg mol ^–1的聚乙烯的生产。此外，${}^{{\mathrm{中号}\mathrm{Ë}}_{\mathrm{2个}}}\mathrm{小号}\mathrm{乙}$将（Cp，I *）Zr（CH ₂ SiMe ₃）₂固定在MAO改性的层状双氢氧化物（LDHMAO）上。淤浆相的聚合活性${}^{{\mathrm{中号}\mathrm{Ë}}_{\mathrm{2个}}}\mathrm{小号}\mathrm{乙}$该支持系统上的（Cp，I *）Zr（CH ₂ SiMe ₃）₂与sMAO支持类似；但是，聚合物的形态不均一。