Patent ID: 7645716

Claim:
A binuclear, oxygen-bridged, bimetallic complex of the general formula I: [(LM 1 R 1 )(Cp 2 M 2 R 2 )](μ-O) (I) where: M 1 =Al, Ge, Zr or Ti; M 2 =Zr, Ti or Hf; Cp=cyclopentadienyl; R 1 , R 2 =H′; C(1-6)alkyl; halogen; aryl; SiMe 3 ; and alkylaryl where aryl =C 6 H 5-n X n X=halogen, C(1-6)alkyl, aryl, NO 2 , SO 3 H, NR 3 2 , where R 3 ═C(1-6)alkyl or H and n=0 to 5; and L=a bidentate, doubly heteroatom-coordinated organochemical ligand which together with the metal M 1 forms a 5- or 6-membered ring.