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Quinoidal Azaacenes: 99 % Diradical Character.
- Source :
-
Angewandte Chemie . 7/20/2020, Vol. 132 Issue 30, p12496-12501. 6p. - Publication Year :
- 2020
-
Abstract
- Quinoidal azaacenes with almost pure diradical character (y=0.95 to y=0.99) were synthesized. All compounds exhibit paramagnetic behavior investigated by EPR and NMR spectroscopy, and SQUID measurements, revealing thermally populated triplet states with an extremely low‐energy gap ΔEST′ of 0.58 to 1.0 kcal mol−1. The species are persistent in solution (half‐life≈14–21 h) and in the solid state they are stable for weeks. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00448249
- Volume :
- 132
- Issue :
- 30
- Database :
- Academic Search Index
- Journal :
- Angewandte Chemie
- Publication Type :
- Academic Journal
- Accession number :
- 144544616
- Full Text :
- https://doi.org/10.1002/ange.201915977