Synthesis of Vanadium (V) Complex with Bulky Phenoxy Ligand and the Study of Catalysis Behavior in Ethylene (Co)polymerization

A series of imido-vanadium complexes containing bulky aryloxo ligand have been isolated and employed as catalyst in ethylene (co)polymerization. The introduction of bulky ligand in the vanadium complex structure could promote the thermal stability of catalyst in ethylene polymerization. Especially the corresponding catalysts remain good activity in the ethylene copolymerization with polar monomers such as 10-undecen-1-ol (UOH) and methyl 10-undecenoate (UA). In the attempted copolymerization with acrylate monomer, the vanadium catalysts still show moderate activity but only afford polyethylene.