The incorporation of a phenanthrene moiety into a porphyrin framework achieved by B. Szyszko results in the formation of a hybrid macrocycle-phenanthriporphyrin-merging the structural features of polycyclic aromatic hydrocarbons and porphyrins. An antiaromatic aceneporphyrinoid, adopting the trianionic {CCNN} core, is suitable for the incorporation of a phosphorus(V) center to form a hypervalent organophosphorus(V) derivative.
Further reading
Szyszko, B.; Białońska, A.; Szterenberg, L.; Latos-Grażyński, L. Phenanthriporphyrin: Antiaromatic Aceneporphyrinoid as Surrounding for Hypervalent Organophosphorus(V). Angew. Chem. Int. Ed. 2015, 54, 4932.