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Cover Feature: Enthalpically and Entropically Favorable Self‐Assembly: Synthesis of C 4 h ‐Symmetric Tetraazatetrathia[8]circulenes by Regioselective Introduction of Pyridine Rings (Chem. Eur. J. 18/2021)
Author(s) -
Akahori Shuhei,
Sasamori Takahiro,
Shinokubo Hiroshi,
Miyake Yoshihiro
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.202100130
Subject(s) - pyridine , chloroform , chemistry , electron pair , methanol , enthalpy , cover (algebra) , entropy (arrow of time) , crystallography , computational chemistry , thermodynamics , medicinal chemistry , organic chemistry , physics , electron , mechanical engineering , quantum mechanics , engineering
Fujin (the wind god) and Raijin (the thunder god) hold each other's hands : The cover image depicts the collaboration of enthalpy and entropy. This work reports the synthesis of tetraazatetrathia[8]circulenes, which undergo unique self‐assembly. The self‐assembly in chloroform and methanol is favored by both enthalpic and entropic factors. The unique association behavior is due to the presence of pyridinic nitrogen atoms, which weakly coordinate to the hydrogen atoms of these solvents and reduce the π‐electron density of the circulene cores. More information can be found in the Full Paper by Y. Miyake et al. on page 5675.