Addition of a solution of a primary alkyl bromide or iodide and 1, 8-diazabicyclo [5.4. 0] undec-7-ene in tetrahydrofuran (THF) to a solution prepared from dichlorobis (triphenylphosphine) nickel, triphenylphosphine, and n-butyl-lithium in THF results in an elimination at room temperature to give, in most cases, the terminal alkene.