Electronic Absorption Spectra of Some Triazolopyrimidine Derivatives

Table 7

Calculated and observed band maxima, intensities, and dipole transition of 3-Acetyl-1-(4-chloro-phenyl)-1H-[1, 2, 4] triazolo [3, 4-b] quinazolin-5-one.

State	Theoretical					Experimental
	Configuration	Coefficient	λ, nm	𝑓	μ	Polar	Nonpolar
						λ, nm	λ, nm
I	59-60	0.447	377	0.001	7.3992	—	374
	59–61	0.824
II	59-60	0.894	355	0.6553	3.0741	358	355
III	59-61	0.830	310	0.2924	7.0622	304	305
IV	59–62	0.919	280	0.0792	4.2378	298	290
V	56–60	0.767	243	0.3583	6.4620	250	250
VI	57–60	0.688	224	0.3585	12.0667	227	228
	57–62	0.697