Also described herein is the synthesis of linear α olefins by the oligomerization of ethylene using as {TAIL ~ a catalyst system} a combination a nickel compound having a selected α diimine ligand and {HEAD ~ a selected Lewis} or Bronsted acid, or by contacting selected α diimine nickel complexes with ethylene 
Also described herein is the synthesis of linear α olefins by the oligomerization of ethylene using as { TAIL ~ a catalyst system } a combination a nickel compound having a selected α diimine ligand and { HEAD ~ a selected Lewis } or Bronsted acid , or by contacting selected α diimine nickel complexes with ethylene
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