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Beilstein J. Org. Chem. 2016, 12, 2673–2681, doi:10.3762/bjoc.12.264
Graphical Abstract
Figure 1: Examples of anionic N-heterocyclic carbenes.
Scheme 1: A postulated mesomeric betaine – NHC equilibrium (6A/6B) and formation of an anionic NHC 7. Formati...
Figure 2: Molecular drawing of one of the two crystallographic independent molecules of borane adduct 8 (disp...
Figure 3: Molecular drawing of the cation of the gold complex 9 (displacement parameters are drawn at 50% pro...
Scheme 2: The anionic NHC 7 forms a rhodium complex and a nickel complex. d) [RhCl(COD)]2, toluene, rt to ref...
Figure 4: Molecular drawing of rhodium complex 11 (minor disorder parts omitted for clarity, displacement par...
Figure 5: Molecular drawing of the dimeric nickel complex 12 (displacement parameters are drawn at 50% probab...