Diazanaphthalenes are a class of
aromatic
In chemistry, aromaticity is a chemical property of cyclic ( ring-shaped), ''typically'' planar (flat) molecular structures with pi bonds in resonance (those containing delocalized electrons) that gives increased stability compared to satur ...
heterocyclic chemical compounds that have the formula C
8H
6N
2. 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
Quinazoline is an organic compound with the formula C8H6N2. It is an aromatic heterocycle with a bicyclic structure consisting of two fused six-membered aromatic rings, a benzene ring and a pyrimidine ring. It is a light yellow crystalline solid ...
,
quinoxaline
A quinoxaline, also called a benzopyrazine, in organic chemistry, is a heterocyclic compound containing a ring complex made up of a benzene ring and a pyrazine ring. It is isomeric with other naphthyridines including quinazoline, phthalazine a ...
, and
phthalazine
*six ''naphthyridines'' with one N atom in each ring
Isomers
References
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