Electronic structure of groups of isomeric heteroaromatic systems. V. Monohydroxydiazines and diazinones was written by La Manna, Gianfranco;Cignitti, Maurizio. And the article was included in Gazzetta Chimica Italiana in 1972.COA of Formula: C4H4N2O This article mentions the following:
π-Electron energies and π-dipole moments were calculated for 3-pyridazinol (I), 3(2H)-pyridazinone (II), 2-pyrimidinol (III), 2(1H)-pyrimidinone (IV), and 9 other pyridazine and pyrimidine keto-enol tautomers. The lactam structures were the most stable. In the experiment, the researchers used many compounds, for example, 4-Hydroxypyridazine (cas: 20733-10-2COA of Formula: C4H4N2O).
4-Hydroxypyridazine (cas: 20733-10-2) belongs to pyridazine derivatives. Pyridazine and phthalazine have quite different spectroscopic properties compared with their isomers, pyrazine and quinoxaline. The activity depends upon the changes of substituted groups in the pyridazine ring system resulting in different biological activities. In addition, the natural pyrimidine bases uracil, thymine, and cytosine, which are constituents of the nucleic acids, are found to be the most important naturally occurring diazines.COA of Formula: C4H4N2O
Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem