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