Using our method, we hypothesized that it would be possible to perform a diverse range of CEC reactions under the same conditions by modifying the loadings of bpy Ni and Co Pc to match the reactivity of the aryl and alkyl halides, respectively. Specifically, we proposed that an aryl halide, such as iodobenzene, could be coupled with alkyl electrophiles of varying reactivities, such as unactivated alkyl iodides and highly activated benzyl chlorides, by optimizing the loadings of bpy Ni and Co Pc under the same general conditions we employed to couple aryl bromides with alkyl bromides (Scheme 1). In agreement with this model, we were able to couple iodobenzene with 1iodo-3-phenylpropane using 2.5 mol% bpy Ni and 2.5 mol% Co Pc in 97% yield under the same reaction conditions utilized in Table (Scheme 1a and see SI for optimization). Further, we can also couple iodobenzene with benzyl chloride using 7 mol% bpy Ni and 0.5 mol% Co Pc in 96% yield (Scheme 1b and vide infra for optimization). We propose that the reason a much higher loading of bpy Ni to Co Pc is required in the coupling of benzyl chlorides is because they are more easily activated than alkyl iodides by Co Pc in catalysis. To our knowledge the ability to couple substrates with such diverse reactivity under the same general reaction conditions with high efficiency is unprecedented in C(sp 2 )-C(sp 3 ) CEC (vide supra).