Syntheses, structures, and properties of dipyridazino-fused 1,3,4,6-tetraazapentalenes was written by Pereira, David E.;Petric, Andrej;Leonard, Nelson J.. And the article was included in Tetrahedron in 1988.Formula: C4H5N3 This article mentions the following:
The fluorescent 2,9-dichloro[2”,3”:1′,2′]imidazo[4′,5′:4,5]imidazo[1,2-b]pyridazine (I, R = Cl) and the unsubstituted parent I (R = H) have been synthesized. The chloro groups of I (R = Cl) were easily displaced by a variety of nucleophiles to provide the 2,9-disubstituted compounds I (R = MeO, N3, NH2, NHNH2, OH). A single crystal x-ray structure determination of the 2,9-dimethoxy compound I (R = MeO) revealed two crystallog. independent structures in the unit cell. I (R = H) forms a 2:1 complex with cobalt(II). In the experiment, the researchers used many compounds, for example, 3-Aminopyridazine (cas: 5469-70-5Formula: C4H5N3).
3-Aminopyridazine (cas: 5469-70-5) belongs to pyridazine derivatives. Pyridazines is a six-membered nitrogen-containing significant heterocycle. It has received considerable interest because of its useful applications as natural products, pharmaceuticals, and various bioactive molecules. 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.Formula: C4H5N3
Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem