Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Volume 44 , Issue 3
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  • Mareike C. Jahnke, F. Ekkehardt Hahn
    2015 Volume 44 Issue 3 Pages 226-237
    Published: March 05, 2015
    Released: March 05, 2015
    [Advance publication] Released: December 19, 2014
    JOURNALS FREE ACCESS
    Next to complexes bearing N,N′-dialkylazolium-derived N-heterocyclic carbenes (NR,NR-NHCs), the coordination chemistry of protic NHC ligands (NH,NR-NHCs and NH,NH-NHCs) has recently attracted attention. The protic NHC ligands offer multiple opportunities for postsynthetic modifications. This review summarizes methods for the generation of complexes with protic NHC ligands, with a special focus on the recently developed oxidative addition of 2-halogenoazoles to low-valent transition metals. Selected applications for complexes with protic NHC ligands, like the template-controlled preparation of NHC-containing macrocycles and the utilization of the NH function of protic carbene ligands as a molecular recognition unit, will also be discussed.
    Next to complexes bearing azolium-derived N-heterocyclic carbenes (NR,NR-NHCs), the coordination chemistry of protic NHC ligands (NH,NR-NHCs and NH,NH-NHCs) has recently attracted attention. The protic NHC ligands offer multiple opportunities for postsynthetic modifications. This review summarizes methods for the generation of complexes with protic NHC ligands with a special focus on the recently developed oxidative addition of 2-halogenoazoles to low-valent transition metals. Selected applications for complexes with protic NHC ligands like the template-controlled preparation of NHC-containing macrocycles and the utilization of the NH function of the protic carbene ligands as molecular recognition unit, will also be discussed. Fullsize Image
     
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