Carbenes are neutral species containing a carbon atom with only six valence electrons. Carbenes are usually formed from precursors by the loss of small, stable molecules. Click the different carbene types below to view the individual reactions:

Type of carbene
Method of formation

P. de Frémont, N. Marion and S. P. Nolan, Coord. Chem. Rev., 2009, 253, 862–892.