Table 2 also highlights in red what we might call poorly behaved intermediates, ones for which at least one functional misassigned the ground state spin. These intermediates tended to be concentrated in the earlier transition metal porphyrins, which exhibit strong binding of oxygen species (note more instances of disagreement in Mn and Fe than for Co and Ni). Cross-referencing with Figure (b), we see that pure GGAs and TPSSh tended to excel in determining spin ordering for weak-binding complexes (both later transition metal species and dioxygen species across all metals), while hybrid and double-hybrids improved predictions for stronger-binding complexes at the expense of some accuracy for the late transition metals.