Synthesis and elemental analysis of metallocene analogic complexes (NpCpTiCl2) containing the azole ligand (Np) are described

in which Np is Pr=Pyrolyl (C4H4N)(1)；Id=Indolyl(C8H6N)(2)；Ai=7-Azaindolyl (C7H5N2)(3)；Iz=Indazolyl(C7H5N2)(4)；Bi=Benzimidazolyl(C7H5N2)(5)

respectively．It is proved hy the experiments that NpCpTiCl2 is active for ethylene polymerization at 30℃ and 0.1 mPa with MAO activation

and the results show that the activity of 1 and 2 which contain one nitrogen in the azole ring is higher than 4 and 5 which contain two nitrogens

while 3 is inactive．For the NpCpTiCl2／MAO system

the activity is “up and down” type with increase in the Al／Ti molar ratio

and up to the highest when the Al／Ti molar ratio is about 500．The polyethylene obtained is characteristic of narrow distribution with molecular weight Mw around 35×104 and molecular weight ratio Mw/Mn less than 3．