Skeletal structure | X | R | R’ | Label |
Imidazol-2-ylidene Thiazol-2-ylidene Oxazol-2-ylidene |
N
|
H
|
H
|
IH
|
N | -CH3 | -CH3 | IMe | |
N | -NH2 | -NH2 | INH2 | |
N | -CN | -CN | ICN | |
N | Mes | Mes | IMes | |
S | H | Nil | ISH | |
S | -CH3 | Nil | ISMe | |
O | H | Nil | IOH | |
O | -CH3 | Nil | IOMe | |
Benzimidazol-2-ylidene |
N
|
H
|
H
|
BH
|
N | -CH3 | -CH3 | BMe | |
Tetrahydropyrimidin-2-ylidene | N | H | H | TH |
N | -CH3 | -CH3 | TMe | |
Permidin-2-ylidene | N | H | H | PH |
N | -CH3 | -CH3 | PMe |