In organic chemistry, diazines are a group of organic compounds having the molecular formula . Each contains a benzene ring in which two of the C-H fragments have been replaced by isolobal nitrogen. There are three structural isomers: pyridazine (1,2-diazine) pyrimidine (1,3-diazine) pyrazine (1,4-diazine)
See also 6-membered rings with one nitrogen atom: pyridines 6-membered rings with three nitrogen atoms: triazines 6-membered rings with four nitrogen atoms: tetrazines 6-membered rings with five nitrogen atoms: pentazines 6-membered rings with six nitrogen atoms: hexazines
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