The α-diimine ligand
ArNC(Me)C(Me)NAr
(Ar =
2,6-C6H3-iPr2)
reacts with Pd(OAc)2 in the presence
of HBF4·Et2O, or
[Pd(MeCN)4](BF4)2 in
the absence of
acid, to give ethylene polymerization catalysts. The
reactions of a related β-diimine ligand with
[Pd(MeCN)4](BF4)2 and
(1,2-dimethoxyethane)NiBr2, and the
polymerization activity of catalysts derived from it, are discussed.
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