Lucia Bonomo, Euro Solari, Géraldine Martin, Rosario Scopelliti and Carlo Floriani
Nickel(II)-meso-octaethylporphyrinogen dianion behaves as a π-extended ligand binding four M(CO)3 [M = Cr, Mo] fragments at the periphery, so that the porphyrinogen can assemble five metal centers around itself.