A Doubly meso‐α Linked N‐Confused Porphyrin Tape Silver(III) Complex Comprising an Antiaromatic Pyrrolo[2,3‐f]indole Segment

The free base form of doubly meso‐α linked N‐confused porphyrin (NCP) tape 3 was successfully synthesized via Ir(I) mediated intramolecular coupling. The following silver complexation afforded the Ag(III) complex of doubly meso‐α linked NCP tape 4. While 3 exhibited 38π aromatic characters, 4 exhibited not only 18π aromatic NCP‐type characteristics but also a decent antiaromatic contribution of 12π pyrrolo[2,3‐f]indole segment, as probed by NMR spectra, absorption spectra, and DFT calculations.