Organic compound (C4H4N2); benzene with two CH groups replaced by N
Not to be confused with Diazene or Diazane.
In organic chemistry, diazines are a group of organic compounds having the molecular formula C4H4N2. Each contains a benzene ring in which two of the C-H fragments have been replaced by isolobal nitrogen.[1] There are three structural isomers:
pyridazine (1,2-diazine)
pyrimidine (1,3-diazine)
pyrazine (1,4-diazine)
^Lin-Vien, Daimay; Colthup, Norman B.; Fateley, William G.; Grasselli, Jeanette G. (1991-01-01). "Aromatic and Heteroaromatic Rings". The Handbook of Infrared and Raman Characteristic Frequencies of Organic Molecules. Academic Press. pp. 277–306. doi:10.1016/B978-0-08-057116-4.50023-7. ISBN 978-0-12-451160-6.
are three structural isomers: pyridazine (1,2-diazine) pyrimidine (1,3-diazine) pyrazine (1,4-diazine) 6-membered rings with one nitrogen atom: pyridines...
heterocyclic, organic compound similar to pyridine (C5H5N). One of the three diazines (six-membered heterocyclics with two nitrogen atoms in the ring), it has...
Names Preferred IUPAC name Pyrazine Other names 1,4-Diazabenzene, p-Diazine, 1,4-Diazine, Paradiazine, Piazine, UN 1325 Identifiers CAS Number 290-37-9 Y...
colorless liquid with a boiling point of 208 °C. It is isomeric with two other diazine (C4H4N2) rings, pyrimidine and pyrazine. Pyridazines are rare in nature...
hence its lower melting point but the melting point again increases with diazine and triazines. Many cage-like compounds like adamantane and cubane with...
Sulfadiazine is an antibiotic. Used together with pyrimethamine, a dihydrofolate reductase inhibitor, it is the treatment of choice for toxoplasmosis,...
4-hydroxypyrimidine respectively, based on a substituted pyrimidine, or 1,3-diazine, ring. Derivatives of pyrimidone are the basis of many other biological...
acid bacteria contamination of the fruit. Uracil derivatives containing a diazine ring are used in pesticides. Uracil derivatives are more often used as...
Hexahydropyridazine 6-membered aromatic rings with two nitrogen atoms: Diazine Pyrazine pyrimidine pyridazine 6-membered saturated rings with three nitrogen...
aromatic nitrogen heterocycles are pyridines with one ring nitrogen atom, diazines with 2 nitrogen atoms in the ring, triazoles with 3 nitrogens in a 5 membered...
Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine...
Other names 1,3-diazanaphthalene benzopyrimidine phenmiazine benzo-1,3-diazine Identifiers CAS Number 253-82-7 Y 3D model (JSmol) Interactive image ChEBI...
Levelers (examples include dyes such as Janus Green B, Alcian Blue, and Diazine Black) Without these additives, copper will preferentially deposit on the...
one nitrogen atom: pyridine 6-membered rings with two nitrogen atoms: diazines 6-membered rings with three nitrogen atoms: triazines 6-membered rings...
one nitrogen atom: pyridine 6-membered rings with two nitrogen atoms: diazines 6-membered rings with three nitrogen atoms: triazines 6-membered rings...
Basic Black 2 Names Other names Diazine Black; Sumiacryl Black G; Janus Black Identifiers CAS Number 4443-99-6 3D model (JSmol) Interactive image ChemSpider...
metastable. 6-membered rings with other numbers of nitrogen atoms: pyridines, diazines, triazines, tetrazines, and (like hexazine, theoretical) pentazines Azide...
Michael; Mihovilovic, Marko D., eds. (2013). Metalation of Azines and Diazines. Berlin, Heidelberg: Springer Berlin Heidelberg. ISBN 978-3-642-35022-1...
contributions by F. Chevallier [and nine (2013). Metalation of Azines and Diazines. Berlin, Heidelberg: Springer Berlin Heidelberg. ISBN 978-3-642-35022-1...
The molecular formula C4H4N2 may refer to: Diazines Pyrazine Pyridazine Pyrimidine Succinonitrile, or butanedinitrile This set index page lists chemical...
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