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Nonalternant Acenaphthylene-Fused Carbaporphyrins: Topological Modulation of π-Delocalization, (Anti)aromaticity, and
Arumugam Kalaiselvan1, Chetan Kumar Prasad1, Shambhavi Sah1
1School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Odisha 752050, India.
Abstract:
Acenaphthylene (AN) fusion at the meso-position served as a structural and electronic modulator in carbaporphyrinoids, where the isomeric homocarbaporphyrinoids and their BIII complexes remain nonaromatic due to electronic decoupling or nonplanarity. In contrast, the isolated [24]carbapentaphyrin(2.1.1.1.1) sustained global antiaromaticity. These findings confirm that AN fusion is an advantageous strategy for designing nonclassical porphyrinoid architectures with tunable (anti)aromatic properties.
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