Del Bene, Janet E. et al. published their research in Molecular Physics in 2010 | CAS: 33097-39-1

3,6-Difluoropyridazine (cas: 33097-39-1) belongs to pyridazine derivatives. Pyridazine and phthalazine have quite different spectroscopic properties compared with their isomers, pyrazine and quinoxaline. Pyridazine is bioavailable (especially in the CNS) and can reduce toxicity. Pyridazine is a component of several drug molecules, and the pyridazine pharmacophore has contributed to a variety of pharmacologically active compounds.Quality Control of 3,6-Difluoropyridazine

Two-, three-, and four-bond N-F spin-spin coupling constants in fluoroazines was written by Del Bene, Janet E.;Alkorta, Ibon;Elguero, Jose. And the article was included in Molecular Physics in 2010.Quality Control of 3,6-Difluoropyridazine This article mentions the following:

Ab initio EOM-CCSD calculations were performed to investigate 2-, 3- and 4-bond 15N-19F coupling constants in mono-, di-, and trifluoroazines. 2J(N-F) values are neg. and are dominated by the Fermi-contact (FC) term. Absolute values of 2J(N-F) tend to decrease as the number of N atoms in the ring increases, and may also be influenced by the number and positions of C-F bonds. 3J(N-F) values are pos. with three exceptions, are usually dominated by the FC term, and also tend to decrease as the number of N atoms increases. The three mols. which have neg. values of 3J(N-F) have dominant neg. paramagnetic-spin orbit (PSO) terms, and are structurally similar insofar as they have an intervening C-F bond between the N and the coupled F. 4J(N-F) values are neg. because the PSO, FC, and spin-dipole (SD) terms are neg., with only one exception. Four mols. have significantly greater values of 4J(N-F). These are structurally similar with the coupled N bonded to two other N atoms. The computed EOM-CCSD nJ(N-F) coupling constants are in good agreement with the few exptl. values that are available. In the experiment, the researchers used many compounds, for example, 3,6-Difluoropyridazine (cas: 33097-39-1Quality Control of 3,6-Difluoropyridazine).

3,6-Difluoropyridazine (cas: 33097-39-1) belongs to pyridazine derivatives. Pyridazine and phthalazine have quite different spectroscopic properties compared with their isomers, pyrazine and quinoxaline. Pyridazine is bioavailable (especially in the CNS) and can reduce toxicity. Pyridazine is a component of several drug molecules, and the pyridazine pharmacophore has contributed to a variety of pharmacologically active compounds.Quality Control of 3,6-Difluoropyridazine

Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem