Triindenotriphenylenes: Spin-Frustrated Triskelion Triradicals with Excellent Ambient Stability.
Angew Chem Int Ed Engl
; 63(36): e202408510, 2024 Sep 02.
Article
en En
| MEDLINE
| ID: mdl-38881362
ABSTRACT
A triskelion-shaped triradical triindeno[1,2-a1',2'-g 1'',2''-m]triphenylen-7-yl (1) and its internally fused derivative (2) obtained by oxidative cyclization were prepared in a straightforward synthetic sequence. Both compounds were confirmed to be triradicals and to possess intramolecular antiferromagnetic exchange interactions between spins, displaying a spin-frustrated doublet ground state with doublet-quartet energy gaps of -0.14â
kcal/mol for 1 and -0.06â
kcal/mol for 2. Despite their open-shell character, they were sufficiently stable to be handled under ambient conditions on a timescale of days. Both compounds could be reversibly reduced to mono-, di-, and trianions and oxidized to 1+ and 22+, with strong NIR absorptions (1800 to over 3200â
nm) observed for all open-shell ions.
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1
Base de datos:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
/
Angew. Chem. (Int. ed., Internet)
/
Angewandte Chemie (International ed. Internet)
Año:
2024
Tipo del documento:
Article