Linear and curved antiaromatic -indacenodicarbazole isomers were synthesized and characterized to show the tunable paratropicity of -indacene, as analyzed by NICS(1) and ACID (ring-current) calculations. The curved isomer showed a greater degree of antiaromaticity than the linear isomer, as predicted by the Glidewell-Lloyd rule. This degree of antiaromaticity was further validated by the red-shifted UV-vis absorption and smaller HOMO-LUMO energy gap.
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| http://dx.doi.org/10.1039/d2cc02318k | DOI Listing |
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