Preparation and characterization of acylhydrazone nickel(II) complexes and their catalytic behavior in vinyl polymerization of norbornene and oligomerization of ethylene

The acylhydrazone nickel(II) complexes bearing the derivatives of 4,5-diazafluorene-9-one-benzoylhydrazone or 2-pyridinecarboxaldehyde-benzoylhydrazone show considerable activities for ethylene oligomerization at ambient pressure and good activities for vinyl polymerisation of norbornene when activated with methylaluminoxane.