1134-40-3Relevant articles and documents
TRIPLE-LAYERED NAPHTHALENOPHANE
Otsubo, Tetsuo,Ogura, Fumio,Misumi, Soichi
, p. 4851 - 4854 (1983)
The title compound 1 was synthesized via tetrathianaphthalenophane 7 and showed a marked transannular interaction in the electronic spectrum.
The question of aromaticity in open-shell cations and anions as ion-radical offsprings of polycyclic aromatic and antiaromatic hydrocarbons
Rosokha, Sergiy V.,Kochi, Jay K.
, p. 9357 - 9365 (2007/10/03)
(Chemical Equation Presented) Arene cation-radicals and anion-radicals result directly from the one-electron oxidation and reduction of many aromatic hydrocarbons, yet virtually nothing is known of their intrinsic (thermodynamic) stability and hence "aromatic character". Since such paramagnetic ion radicals lie intermediate between aromatic (Hueckel) hydrocarbons with 4n+2-electrons and antiaromatic analogues with 4n-electrons, we can now address the question of π-delocalization in these odd-electron counterparts. Application of the structure-based "harmonic oscillator model of aromaticity" or the HOMA method leads to the surprising conclusion that the aromaticity of these rather reactive, kinetically unstable arene cation and anion radicals (as measured by the HOMA index) is actually higher than that of their (diamagnetic) parent-contrary to conventional expectations.