Zirconium complexes bearing a tetradentate dipyrrolyl ligand

Abstract

Using a tetradentate, dianionic ligand several new zirconium complexes have been prepared. These pyrrolyl compounds, unlike their titanium analogues, are inactive in hydrohydrazination catalysis. However, they are quite stable, and their reactivity with H₂NR, where R = Ph, C₆H₁₁, and NHPh, is reported here. Two of the complexes were characterized by X-ray diffraction.