The con-formations of five doubly neo-confused porphyrin structures., and fifty-four neo-confused N-confused porphyrin (neo-C-NCP) tautomers were minimized using DFT-B3LYP/6-311++G(d,p). The relative stabilities of the tautomers for, each series were, computed using M06-2X and B3LYP-D functionals, and the bond lengths and bond angles were calculated. Nucleus-independent chemical shifts, and anisotropy of induced current density plots were used to provide further insights into the diatropic properties of each Species: The results demonstrate that porphyrinoid structures with two modified rings of this type are far less stable than porphyrins, N-confused porphyrins, or neo-confused porphyrins, but the fully conjugated tautomers retain highly diatropic Characteristics. Nevertheless, the lowest energy neo-C-NCP tautomers have similar relative energies to known doubly N-confused porphyrins, and the results suggest that these types of porphyrin isomers may be synthetically accessible.