Synthesis of new organolanthanide complexes and their use as novel catalysts for polymerization and copolymerization of olefins
نویسندگان
چکیده
The replacement of one of the two C5Me5 ligands in the samarocene(II) complex (C5Me5)2Sm(thf)2 with a monodentate anionic ligand such as OAr, SAr, NR1R2, or CH(SiMe3)2 gave a unique catalytic system, which can not only polymerize styrene and ethylene, but also copolymerize them into block styrene–ethylene copolymers under the presence of both monomers. On the other hand, the addition of an appropriate cocatalyst such as MMAO or AlR3/[Ph3C][B(C6F5)4] to the samarocene complex (C5Me5)2Sm(thf)2 or (C5Me5)2Sm(μMe)2AlMe2 afforded a novel living catalytic system for stereospecific 1,4-cis polymerization of 1,3-butadiene and copolymerization of 1,3-butadiene with styrene.
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