Favini, Giorgio; Simonetta, Massimo published an article in 1960, the title of the article was Electronic transitions in the aromatic chlorazines. II. Application of the method of Pariser and Parr to the azines of the monochlorinated benzene series.Application In Synthesis of 5-Chloroquinoxaline And the article contains the following content:
cf. CA 55, 7033g. 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. The experimental process involved the reaction of 5-Chloroquinoxaline(cas: 62163-09-1).Application In Synthesis of 5-Chloroquinoxaline
5-Chloroquinoxaline(cas:62163-09-1) belongs to quinoxaline. The antitumoral properties of quinoxaline compounds have been of interest. Recently, quinoxaline and its analogs have been investigated as the catalyst’s ligands. Application In Synthesis of 5-Chloroquinoxaline
Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider