Answers are grounded in this paper and cite their sources.
This exploration reveals differences in bond length alternation in hexaphyrins, indicating anti-aromatic characteristics.
In the previous post, I looked at a class of molecule known as hexaphyrins, inspecting bond length alternation (BLA) at the so-called meso position, the carbon atom joining two pyrrole rings. A search of the difference in bond lengths at this position had shown two significant clusters of crystal structures.
No takes yet. Share an insight, caveat, or question.
Henry S. Rzepa (2019) studied this question.
Synapse has enriched 8 closely related papers on similar clinical questions. Consider them for comparative context: