Diazene, also called diimine or diimide, is the organic compound having the formula HN=NH. Azo compounds can be considered to be formally derived from diazene by substituting the hydrogen atoms with organyl groups. Because each nitrogen atom bears one hydrogen and one lone pair and double bonds cannot rotate, diazene exists in distinct cis and transgeometric isomers..or A compound containing a benzene ring in which two of the carbon atoms have been replaced by nitrogen atoms.
Diazine refers to a group of organic compounds having the molecular formula C4H4N2. Each contains a benzene ring in which two of the carbon atoms have been replaced by nitrogen. There are three isomers:
