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<正>Two multi-nuclear titanium complexes [Ti(η5-Cp*)Cl(μ-O)]3 (1) and [(η5-Cp*TiCl)(μ-O)2(η5-Cp*Ti)2(μ-O)(μ-O)2]2Ti (Cp*=C5Me5) (2) have been investigated as the precatalysts for syndiospecific polymerization of styrene. In the presence of modified m