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The aromaticity of charged expanded porphyrins turns out to be much more complex to study than that of their planar neutral analogues. In particular, identifying the most conjugated circuit is no longer straightforward. In addition to planarity, the protonation and deprotonation of porphyrinoids play an important role in determining their aromaticity. We have demonstrated that the largest charged...
Despite the central role of aromaticity in the chemistry of expanded porphyrins, the evaluation of aromaticity remains difficult for these extended macrocycles. The presence of multiple conjugation pathways and different planar and nonplanar π‐conjugation topologies makes the quantification of global and local aromaticity even more challenging. In neutral expanded porphyrins, the predominance of the...
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