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Front Cover: Thiophene‐Fused 1,4‐Diazapentalene: A Stable C=N‐Containing π‐Conjugated System with Restored Antiaromaticity (Chem. Eur. J. 65/2021)
Author(s) -
Usuba Junichi,
Fukazawa Aiko
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202103895
Subject(s) - thiophene , pentalene , antiaromaticity , conjugated system , chemistry , photochemistry , protonation , heteroatom , condensation , polymer chemistry , materials science , aromaticity , organic chemistry , polymer , molecule , ring (chemistry) , physics , ion , thermodynamics
The strength of the antiaromaticity of the title compounds is represented by the power of a phoenix. The phoenix, deprived of its vitality by the arrow of nitrogen, leaps into the flames of thiophene and is reborn strong again. This is a metaphor for the fact that the antiaromaticity of the 8π‐electron system pentalene is substantially impaired by nitrogen doping, but is restored by the condensation of thiophene rings. More information can be found in the Full Paper by J. Usuba and A. Fukazawa (DOI: 10.1002/chem.202103122).