Multi-nuclear metallocene catalyst and method for preparing synodiotactic polystyrene using the multi-nuclear metallocene catalyst

This invention discloses a polynucleation transition metal half-metallocene catalyst that has polynucleation half-metallocene structure, among them one side of transition metal that is in 3-10 subgroup in the periodic chart links with cyclane-diene group or its derivative group, besides the other side links with alcohol phenyl that has many binding site or alcohol phenyl amine compound. This metallocene catalyst together with little promoter are used to actively prepare inter-isomorphism benzene vinyl polymer that has extremely excellent stereoregularity, high melting point and wide molecular weight distribution. This invention further discloses a method of using this catalyst to prepare benzene vinyl polymer.