Synthesis and catalytic activity of binuclear titanium imido complexes

Abstract

Treatment of the N–P ligand Ar^PN(SiMe₃)₂ with TiCl₄ affords the imido-bridged binuclear titanium complex [TiCl₂(THF)(μ-NAr^P)]₂ (Ar^P = m-C₆H₄PR₂) which reacts with Ni(0) or Pd(II) to give heterotrinuclear compounds, while activation with methylaluminoxane generates a new type of imido-based ethene polymerisation catalyst that is tolerant of –PR₂ functional groups.