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- Li, Han; Guo, Yu-Hua; Wu, Jun-Yan; Zhang, Ming-Tian
- Chemical communications 2019 v.55 no.24 pp. 3465-3468
- cations; chemical bonding; electron transfer; hydrogen; oxidants; oxidation
- ... Here, we report the proton-coupled electron transfer reaction between TEMPO-H and Wurster's blue salt (TMPDA˙⁺). TMPDA˙⁺ could abstract a hydrogen atom from 2,2,6,6-tetramethyl-1-hydroxy-piperidine (TEMPO-H) via concerted electron–proton transfer and displayed a large KIE (7.05 ± 0.07 at 298 K). This work shows that a nitrogen-centered radical cation (R₃N˙⁺) such as TMPDA˙⁺ is more than a weak sin ...