Synthesis of sp<sup>3</sup>C1-Bridged Constrained Geometry Complexes and their Application for Copolymerization of Ethylene and 1-Octene<sup></sup>

Novel sp 3 C1-bridged constrained geometry complexe(CGC) were synthesized, and fulvene was used as initial stuff, they were characterized by 1H-NMR, 13C NMR, MS and EA. The CGC/methylaluminoxane (MAO) system show activation for copolymerization of ethylene and 1-octene under 1.0 atmospheric pressure (Complex 2/MAO, 1.196 × 106 g-Polymer /mol-Zr•h, Pethylene = 1.0 atm, Al/Zr = 1000, time = 30 min,1-Octene content in polymer = 5.46 mol%).