Titanium (II) or zirconium (II) complexes and addition polymerization catalysts comprising the same (Titanium (II) or Zirconium (II) complexes and addition polymerization catalysts therefrom)

摘要

M is titanium or zirconium in the +2 type oxidation state, and L is a group containing an unlocalized anionic cyclic π-system, wherein the group is bonded to Z and also to Z through the π-system, Z is a moiety bonded to M via σ-bond, comprising boron or a Group 14 element of the Periodic Table of the Elements, also comprising nitrogen, phosphorus, sulfur or oxygen, and having up to 60 non-hydrogen atoms, X being A general conjugate that is a neutral conjugated or nonconjugated diene containing up to 40 carbon atoms, optionally substituted by one or more hydrocarbyl groups, to form a π-complex with M The novel tee or zirconium complexes containing only one unlocalized and π-bonded anionic cyclic group of are catalytically activated for use as addition polymerization catalysts.;Preferably, L is any substituted cyclopentadienyl or fused ring cyclopenta dienyl group.