The infrared spectra of some diaza- and triazanaphthalenes and of 1,4,5,8-tetraazanaphthalene was written by Armarego, W. L. F.;Barlin, G. B.;Spinner, E.. And the article was included in Spectrochimica Acta in 1966.Category: pyrazines This article mentions the following:
The ir spectra of 1,2-, 1,3-, 1,4-, 1,5-, 1,6-, 1,7-, and 1,8-diaza-, 1,3,4-, 1,3,5-, 1,3,6-, 1,3,7-, 1,3,8-, 1,4,5-, and 1,4,6-triaza-, and 1,4,5,8-tetraazanaphthalene, and the Raman spectrum of 1,5-diazanaphthalene, have been determined and correlated. Band assignments for 1,4,5,8-tetraaza- and 1,5-diazanaphthalene are discussed in relation to those for naphthalene. In the experiment, the researchers used many compounds, for example, Pyrido[2,3-b]pyrazine (cas: 322-46-3Category: pyrazines).
Pyrido[2,3-b]pyrazine (cas: 322-46-3) belongs to pyrazine derivatives. Pyrazine has the elements of symmetry for the point group D2h. It has three mutually perpendicular two-fold axes. It also has three mutually perpendicular planes of symmetry. As a result, pyrazine also has a centre of symmetry. Pyrazine and a variety of alkylpyrazines are flavor and aroma compounds found in baked and roasted goods. Tetramethylpyrazine (also known as ligustrazine) is reported to scavenge superoxide anion and decrease nitric oxide production in human Granulocytes.Category: pyrazines