Self-immobilized metallocene catalysts bearing an allyl group for ethylene polymerization, X-ray crystal structure of [(CH2CHCH2)CH3Si(C13H8)2]ZrCl2

A series of ansa-metallocene complexes with an allyl substituted silane bridge [(CH2CHCH2)CH3Si(C5H4)2]TiCl2 (1), [(CH2CHCH2)CH3Si(C9H6)2]MCl2 [M=Ti (2), Zr (3), Hf (4)] and [(CH2CHCH2)CH3Si(C13H8)2]ZrCl2 (6) have been synthesized and characterized. The molecular structure of 6 has been determined by X-ray crystallographic analysis. Complexes 1–4, 6 bearing allyl groups have been investigated as self-immobilized catalysts for ethylene polymerization in the presence of MMAO. The results showed that the self-immobilized catalysts 1–4, 6 kept high ethylene polymerization activities of ca. 106 g PE mol−1 M h−1 and high molecular weight (Mw≈105) of polyethylene.