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Two Cationic Antiaromatic Free-Base Corroles
Pengfei Li1, Fan Wu2, Chulin Qu1
1State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
None:
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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