SET processes in Lewis acid–base reactions: the tritylation of N-heterocyclic carbenes

Reactions between N-heterocyclic carbenes (NHCs) and the trityl cation, [Ph(3)C](+), give covalent adducts of type [NHC–CPh(3)](+) and/or [NHC–C(6)H(5)–CPh(2)](+). EPR spectroscopy, UV-Vis analyses, and trapping experiments imply that adduct formation involves carbene radical cations and the trityl...

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Detalles Bibliográficos
Autores principales: Dong, Zhaowen, Pezzato, Cristian, Sienkiewicz, Andrzej, Scopelliti, Rosario, Fadaei-Tirani, Farzaneh, Severin, Kay
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8159480/
https://www.ncbi.nlm.nih.gov/pubmed/34094138
http://dx.doi.org/10.1039/d0sc01278e
Descripción
Sumario:Reactions between N-heterocyclic carbenes (NHCs) and the trityl cation, [Ph(3)C](+), give covalent adducts of type [NHC–CPh(3)](+) and/or [NHC–C(6)H(5)–CPh(2)](+). EPR spectroscopy, UV-Vis analyses, and trapping experiments imply that adduct formation involves carbene radical cations and the trityl radical. The results demonstrate that single electron transfer (SET) processes should be considered for reaction of NHCs with oxidizing Lewis acids.

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