peri-Benzo-Diindenotetracenyl: Helically π-Extended Allyl Radical with Robust Stability.
Chemistry
; 30(43): e202401353, 2024 Aug 01.
Article
en En
| MEDLINE
| ID: mdl-38818544
ABSTRACT
Here is described the synthesis and characterization of a stable hydrocarbon radical, peri-benzo-diindenotetracenyl, with a helical structure. Although the helical π-radical has no peripheral substituents, it was stable in the solid and solutions. According to the X-ray diffraction analysis and quantum chemical calculations, the radical was best described as an allyl radical fused by five Clar's sextets. The optically resolved enantiomers exhibited mirror image CD spectra with |gCD| of 2.4×10-4 at 522â
nm. The racemization barrier was determined to be 95.9â
kJ/mol at 298â
K, which is compatible with that of [5]helicene (108â
kJ/mol).
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Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Chemistry
Asunto de la revista:
QUIMICA
Año:
2024
Tipo del documento:
Article
País de afiliación:
Japón