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