In contrast to the clear metal center dependence described above with int1, there does not appear to be any systematic trends in the overall Free energy change associated with carbon capture. All carbon dioxide to carbonate reactions are predicted to be highly exergonic at room temperature with ∆Gs ranging from -53.6 kcal/mol with Hf to -73.2 kcal/mol with V (Table ). By taking the ratio between the carbon capture and decomposition Free energies, a metric expressing which reaction will dominate under thermodynamic control is obtained. From these data, the metal groups fall in three distinct regimes of reaction favorability: ≫ 1, Group IV; ∼ 1, Group V; and ≪ 1, Group VI. On thermodynamic grounds, only Group VI complexes can be dismissed as unstable relative to DAC, whereas the Group IV and V counterparts hold promise depending on the kinetic barriers involved.