Diazine

 ( Simple Aromatic Rings ) 

In organic chemistry, diazines are a group of having the molecular formula . Each contains a benzene ring in which two of the C-H fragments have been replaced by isolobal nitrogen.

• pyridazine (1,2-diazine)
• pyrimidine (1,3-diazine)
• pyrazine (1,4-diazine)

• 6-membered rings with one nitrogen atom:
• 6-membered rings with three nitrogen atoms:
• 6-membered rings with four nitrogen atoms:
• 6-membered rings with five nitrogen atoms:
• 6-membered rings with six nitrogen atoms: