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Synthesis, structure and polymerization catalytic properties of doubly bridged bis(cyclopentadienyl) dinuclear titanium and zirconium complexes
Journal of Organometallic Chemistry 645(2002)212-217，-0001，（）：
A series of doubly bridged dinuclear titanium and zirconium complexes (Me2C)(Me2E)(C5H3)2(Cp'MCI2)2 [E=Si,Cp'=C5H5, M=Ti (1), Zr (2); E=Ge, Cp'=C5H5, M=Ti (3), Zr (4); Cp'=C5Me4H, M=Zr, E=Si (5), Ge (6)] and (Me2SiOSiMe2)2(C5H3)2(Cp'MCI2)2[Cp'=C5H5, M=Ti (7), Zr (8); Cp=C5Me4H, M=Zr (9)] were synthesized by the reaction of the lithium compounds of the corresponding doubly bridged cyclopentadienyl ligands with CpTiCl3, CpZrCl3(THF)2 or C5Me4HZrCl3, respectively. These complexes were characterized by 1H-NMR, MS and elemental analysis. The crystal structure of 4 was determined by the X-ray diffraction. Their catalytic properties for ethylene polymerization were also studied in the presence of MAO.
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