Synthesis of Metallocene Complexes

Metallocene complexes, which have group IV elements like Ti, Zr, and Hf as center metals, are used in a variety of reactions both as catalysts for olefin polymerization and as reaction agents for stereoselective reactions.¹⁾ Metallocene complexes 2 and 3, having 1,2-bis(3-indenyl)ethane (1) as a ligand, are employed as catalysts for isotactic polymerization of propyrene in the presence of co-catalyst methylaluminoxane (MAO).²⁾