Electronic Absorption Spectra of Some Triazolopyrimidine Derivatives

Table 1

Calculated and observed band maxima, intensities, and dipole transition of 3-Acetyl-1-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	56-57	0.5193	382	0.001	5.6759	375	375
	56–58	0.8130
II	56-57	0.870	350	0.558	0.9529	362	360
III	56-57	0.912	320	0.7622	2.5338	320	325
	56–59	0.646	300	0.1449	5.5869	300	301
IV	55–57	0.503
	54–57	0.520
V	56–59	0.864	286	0.0437	13.6527	289	298
VI	54–57	0.775	252	0.2082	8.5341	248	250
VII	55–58	0.472	223	0.0466	5.0933	212	223
	54–58	0.759