Diazoles
As diazoles are heterocyclic aromatic compounds having the formula C 3 H 4 N 2 denotes that a pentatomic ring with three carbon - and two nitrogen containing -atoms. There are two isomers , which are mainly known by their common names .
See also
Web links
Commons : Pyrazole - collection of pictures, videos and audio files
Commons : Imidazole - Collection of pictures, videos and audio files