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- Title
Acid‐Promoted Electron Transfer with Inverse Kinetic Isotope Effect for Disproportionation of Nitroxyl Radicals in CH<sub>3</sub>CN.
- Authors
Wang, Xinyu; Wang, Yongtao; Li, Haoran
- Abstract
Though electron transfer (ET) and proton transfer (PT) are extensively involved in organic reactions, they remain unclear in acid‐enabled disproportionation of nitroxyl radicals, especially in organic solvents. Here we unveil the acid‐promoted electron transfer (APET) mechanism with inverse kinetic isotope effect (KIE) for the disproportionation of 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO) in CH3CN. Kinetic experiments relying on on‐line detection of electron paramagnetic resonance (EPR) was conducted together with theoretical calculations, giving consistent insights on the mechanisms. Moreover, the significant effect of water as cosolvent was revealed. The findings here will encourage further mechanistic understandings and method developments for nitroxyl‐participated organic reactions.
- Subjects
KINETIC isotope effects; CHARGE exchange; RADICALS (Chemistry); NITROXYL; ELECTRON paramagnetic resonance; ELECTRON detection
- Publication
Asian Journal of Organic Chemistry, 2023, Vol 12, Issue 11, p1
- ISSN
2193-5807
- Publication type
Article
- DOI
10.1002/ajoc.202300475