Stereoselective Cyclopolymerization of 1,5-Hexadiene Using Novel Bis(ferrocenyl)zirconocene Catalyst

Abstract
A novel heterotrinuclear zirconium-iron complex 1 was synthesized and crystal structure of 1 was determined by X-ray diffraction method. The complex 1 efficiently catalyzed cyclopolymerization of 1,5-hexadiene in the coexistence of methylaluminoxane to afford trans-poly(methylene-1,3-cyclopentane) with high stereoselectivity (98% trans).