Organic Letters, Год журнала: 2024, Номер 26(28), С. 5877 - 5882
Опубликована: Июль 3, 2024
Antiaromatic nucleophilic substitution reactions in cycloheptatrienide pyridinium and phosphonium zwitterions with initial formation of a cycloheptatetraene intermediate are explored. The mechanism was supported by quantum chemical calculations, first-order reaction kinetics, high-resolution mass spectrometry. zwitterion exhibited weak antiaromaticity, whereas the displayed Möbius aromaticity, as evidenced nuclear independent shift values shape its HOMO. This study represents eighth confirmed instance Möbius-aromatic organic species ground state.
Язык: Английский