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Current Topics in Electrochemistry   Volumes    Volume 16 
Abstract
Direct electrochemical reduction of azolium salts into N-heterocyclic carbenes and their subsequent trapping
Ibrahim Abdellah, Bénédicte Cassirame, Sylvie Condon, Jean-Yves Nédélec, Christophe Pichon
Pages: 81 - 91
Number of pages: 11
Current Topics in Electrochemistry
Volume 16 

Copyright © 2011 Research Trends. All rights reserved

ABSTRACT
 
Azolium salts such as imidazolium, triazolium and benzothiazolium halides can be directly cathodically reduced in DMF solution yielding the corresponding N-heterocylic carbenes (NHCs). A voltamperometric study shows that the reduction potential is linked to the nature of the azolium salt. Preparative electrolyses using an undivided cell allow the preparation of NHCs which can be trapped either by selenium to yield a selenourea derivative with good yields or by a nickel salt to yield a bis-NHC Ni(II) complex.
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