Paramagnetic complexes of monovalent and trivalent nickel in the catalytic system Ni(COD)2/BF3∙ OEt2 active in norbornene polymerization
2011
Abstract It has been shown that the system Ni(COD) 2 /BF 3 ∙ OEt 2 may polymerize norbornene with the activity of 1930 kg NB/molNi h. This catalytic system is characterized by minor content of the Lewis acid; the activity peaks at the molar ratio of B:Ni = 5. The norbornene polymerization was first demonstrated to be attended with the formation of trivalent nickel metallocyclic complexes. A monovalent nickel complex was used as a precursor for the active species.
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