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A three-component reaction of antiaromatic meso -mesityl-3-nitronorcorrolatonickel(II) 1 -NO 2 with dialkyl acetylenedicarboxylate and PBu 3 yields aromatic zwitterionic corrole nickel(II) complexes 3 -R with one of the meso -substituents comprising a positively charged tributyl phosphonium group and negatively charged coordination core. Reaction of 1 -NO 2 with PBu 3 alone resulted in a nonaromatic chiral adduct 5 of a zwitterionic phlorine character with a -PBu 3  + group at a pyrrole β-position.

From Antiaromatic Norcorrolatonickel(II) to Aromatic and Nonaromatic Zwitterions: Innocent Ligands with Unbalanced Charge of the Core