This research reports the creation of two cationic free-base antiaromatic corroles, highlighting their unique properties.
The synthesis of free-base antiaromatic porphyrinoids remains a challenging task. Herein we report the first preparation of two cationic free-base antiaromatic corroles, BC(H2)+ (containing two NH moieties, slightly saddle-shaped) and BC(H4)3+ (containing four NH moieties, severely distorted saddle-shaped), utilizing a strategy of β-annulated benzene rings to suppress side reactions. The antiaromatic character of BC(H2)+ and BC(H4)3+ is robustly supported by crystallographic analysis, spectroscopic evidence, and theoretical calculations.
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Li et al. (2025) studied this question.
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