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| File | Size | Format | |
|---|---|---|---|
| Intorp et al 2020, Quinoidal Azaacenes.pdf | 1,8 MB | Adobe PDF | View/Open |
| Title: | Quinoidal Azaacenes: 99 % Diradical Character |
| Authors: | Intorp, S.N.; Hodecker, M.; Müller, M.; Tverskoy, O.; Rosenkranz, M.; Dmitrieva, E.; Popov, A.A.; Rominger, F.; Freudenberg, J.; Dreuw, A.; Bunz, U.H.F. |
| Publishers Version: | https://doi.org/10.1002/anie.201915977 |
| Issue Date: | 2020 |
| Published in: | Angewandte Chemie - International Edition Vol. 59 (2020), No. 30 |
| Publisher: | Weinheim : Wiley-VCH Verlag |
| 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. |
| Keywords: | acenes; heteroaromatics; radicals; structure elucidation; synthetic methods; Nuclear magnetic resonance spectroscopy; Diradicals; Half lives; Paramagnetic behavior; SQUID measurements; Triplet state; Electron spin resonance spectroscopy |
| DDC: | 540 |
| License: | CC BY 4.0 Unported |
| Link to License: | https://creativecommons.org/licenses/by/4.0/ |
| Appears in Collections: | Chemie |
This item is licensed under a Creative Commons License
