An expanded porphyrinoid has been obtained by a simple ring expansion from a contracted porphyrinoid, namely corrole. Spectroscopic, structural, and computational investigations reveal peculiar π‐conjugation and geometry. The effect of extended π‐conjugation is evident from perturbed redox behavior and photophysical properties. Owing to the strong diatropic ring current of the corrole and cross‐conjugation, the molecule exhibits a non‐aromatic nature for the expanded π‐circuit, as evident from NMR studies.

中文翻译：

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寄生虫双生子的奇怪案例

通过简单的扩环，从收缩的卟啉类化合物，即corrole，获得了膨胀的卟啉类化合物。光谱，结构和计算研究显示出奇特的π共轭和几何形状。从扰动的氧化还原行为和光物理性质可以明显看出π共轭扩展的作用。从核磁共振研究中可以明显看出，由于该环的强变径环电流和交叉共轭作用，该分子在扩展的π电路中表现出非芳香性质。