Also disclosed herein is a process for the production of linear alpha olefins by contacting ethylene with a nickel compound of the formula DAB!NiX2 wherein DAB is a selected α diimine and {TAIL ~ X} is chlorine, bromine, iodine or alkyl, and a selected Lewis or {HEAD ~ Bronsted acid}, or by contacting ethylene with other selected α diimine nickel complexes 
Also disclosed herein is a process for the production of linear alpha olefins by contacting ethylene with a nickel compound of the formula DAB!NiX2 wherein DAB is a selected α diimine and { TAIL ~ X } is chlorine , bromine , iodine or alkyl , and a selected Lewis or { HEAD ~ Bronsted acid } , or by contacting ethylene with other selected α diimine nickel complexes
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