Transition metal-mediated CC bond cleavage has received much attention in recent years. 1 Oxidative addition of a CC bond onto a transition metal provides a direct method to break a CC bond. 2 Catalytic reactions involving this elementary step, however, are still limited due to the inertness of CC σ-bonds toward transition metals. 3, 4 On the other hand, while common with alkali metal and alkali earth organometallics, CO bond cleavage by β- ...