Oxidative Addition at Ni(I). After formation of Ni(I), it is proposed that oxidative addition (OA) of the aryl halide occurs. Oxidative addition at Ni(I) has been directly observed in recent reports with aryl iodides, with a reduced Ir complex, a radiolytic pulse, or photolysis of an organonickel(II) complex as the source of the Ni(II) to Ni(I) reduction. Furthermore, oxidative addition of aryl bromides has been followed via EPR in recent work and also through stoichiometric studies of a dimeric Ni(I) complex, both of which support oxidative addition occurring at a monomeric Ni(I) center. Although useful, none of these studies followed Ni(I) generated directly through photoinduced electron transfer as in our approach.