Electronic Absorption Spectra of Some Triazolopyrimidine Derivatives

Table 5

Calculated and observed band maxima, intensities, and dipole transition of 3-Acetyl-1-(4-methoxy-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	62-63	0.8505	361	0.5234	5.0213	368	355
II	62–64	0.7953	326	0.3086	10.1508	312	313
III	61–63	0.839	263.5	0.3584	10.6888	262	263
IV	61–63	0.845	228	0.0543	15.9894	227	225