Chemistry Letters, Vol.30, No.4, 356-357, 2001
Formation of ethylene-bridged bimetallic zirconocene complexes by coupling of Cp2ZrEt2 and Cp2ZrX2 (X=Cl or Br)
Cp2ZrEt2 reacted with one equiv of Cp2ZrX2 (X = Cl or Pr) in THF To afford ethylene-bridged bimetallic zirconocene complexes, (Cp2ZrX)(2)(CH2CH2) (X = Cl (2a), or Br (2b)), in high yields. The structure of 2b was determined by X-ray analysis. Reactions of 2a-b with various anions Y- gave a series of ethylene-bridged bimetallic zirconocene complexes, (Cp2ZrY)(2)-(CH2CH2) (Y = Ph, Me, Bu, CH2SiMe3) in good to high yields.