Also described herein is {TAIL ~ the synthesis} of linear α olefins by 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 {HEAD ~ ethylene} 
Also described herein is { TAIL ~ the synthesis } of linear α olefins by 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 { HEAD ~ ethylene }
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