Favini, Giorgio et al. published their research in Gazzetta Chimica Italiana in 1960 | CAS: 5448-43-1

6-Chloroquinoxaline (cas: 5448-43-1) belongs to quinoxaline derivatives. Quinoxalines are important class of heterocyclic compounds, associated with wider pharmacological applications. The antitumoral properties of quinoxaline compounds have been of interest. Recently, quinoxaline and its analogs have been investigated as the catalyst’s ligands.COA of Formula: C8H5ClN2

Electronic transitions in the aromatic chlorazines. II. Application of the method of Pariser and Parr to the azines of the monochlorinated benzene series was written by Favini, Giorgio;Simonetta, Massimo. And the article was included in Gazzetta Chimica Italiana in 1960.COA of Formula: C8H5ClN2 This article mentions the following:

The semiempirical method of Pariser and Parr was applied to PhCl (I), 2-, 3-, and 4-chloropyridines (II, III, IV), 2-, 3-, and 4-chloropyrimidines (V, VI, VII), chloropyrazine (VIII), and 3-chloropyridazine (IX). Comparison between theoretical and exptl. findings was limited to the values of energy transitions and oscillator strengths for the 1st singlet-singlet π-π’ transition. Monocentric and bicentric Coulomb integrals were calculated and tabulated. E was calculated for βCCl -0.86 and -2.50 without configuration interaction and with interaction of 5 and 8 configurations and the tabulated values were compared with exptl. values of ΔE. Oscillator strengths were calculated and similarly compared. The theory confirmed in all instances the bathochromic effect on the absorption maximum of the π-π’ transition caused by the introduction of an atom of Cl into C6H6 or an azine and, moreover gave shifts of the correct order of magnitude as shown by the tabulation (compound, Δν theoretical and exptl. (cm.-1) given): I, -870, -1350; II, -860, -1850; III, -1370, -2300; IV, -1830, -990; V, -1090, -1900; VI, -1730, -1250; VII, -2800, -2820; VIII, -970, -1460; IX, -2410, -1860. In the experiment, the researchers used many compounds, for example, 6-Chloroquinoxaline (cas: 5448-43-1COA of Formula: C8H5ClN2).

6-Chloroquinoxaline (cas: 5448-43-1) belongs to quinoxaline derivatives. Quinoxalines are important class of heterocyclic compounds, associated with wider pharmacological applications. The antitumoral properties of quinoxaline compounds have been of interest. Recently, quinoxaline and its analogs have been investigated as the catalyst’s ligands.COA of Formula: C8H5ClN2

Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider