“…The use of elemental Se instead of S in the aforementioned trapping experiment afforded carbene–selenium adduct 12 a . The 77 Se NMR signal recorded for 12 a ( δ =1204.4 ppm, [D 6 ]acetone; 1267.9 ppm, CDCl 3 ) was found to be downfield when compared to the values reported for the Se adducts of a cyclic (alkyl)(amido)carbene (1179.71 ppm, [D 6 ]acetone), DAC 1 ( δ =847 ppm, [D 6 ]acetone), CAArC 2 ( δ =616 ppm, [D 6 ]acetone), and coumaraz‐2‐on‐4‐ylidene 3 ( δ =1103 ppm, [D 6 ]acetone; δ =1143.3 ppm, CDCl 3 ) . Likewise, the 13 C NMR signal assigned to carbene nucleus in 12 a was found to resonate at a relatively downfield value ( δ =202.8 ppm, CDCl 3 ) when compared to the analogous signals recorded for the Se adducts of DAC 1 ( δ =182.7 ppm, CDCl 3 ) or coumaraz‐2‐on‐4‐ylidene 3 ( δ =197 ppm, CDCl 3 ) .…”