Diazanaphthalene

Diazanaphthalenes are a class of aromatic heterocyclic chemical compounds that have the formula C₈H₆N₂. They consist of a naphthalene double ring in which two of the carbon atoms have been replaced with nitrogen atoms. There are ten positional isomers, which differ by the locations of the nitrogen atoms.

The group consist of two subgroups:

• four benzodiazines with both N atoms in one ring: cinnoline, quinazoline, quinoxaline, and phthalazine
• six naphthyridines with one N atom per ring

Isomers

name	structure	subgroup
1,2-diazanaphthalene (cinnoline)	150px	benzodiazine
2,3-diazanaphthalene (phthalazine)	150px	benzodiazine
1,3-diazanaphthalene (quinazoline)	150px	benzodiazine
1,4-diazanaphthalene (quinoxaline)	150px	benzodiazine
1,8-diazanaphthalene	150px	naphthyridine
1,7-diazanaphthalene	160px	naphthyridine
2,7-diazanaphthalene	160px	naphthyridine
1,6-diazanaphthalene	160px	naphthyridine
1,5-diazanaphthalene	150px	naphthyridine
2,6-diazanaphthalene	160px	naphthyridine