Maryam Afshar - Department of Chemistry, Faculty of Basic Sciences, Tehran North, Islamic Azad University, Tehran, Iran

In the ۱- (۴-fluorophenyl) -۲,۳-dihydro-۱ H-naphto- [۱ and ۲-e] [۱ and ۳] oxazine-۳-n, there are ۴ rings, respectively, rings from the side attached to the halogen They are named C, B, A, and D. Calculations and studies show that the amount of aromatics in the halogen-ring A in all cases has the highest number. In the B loop, the predicted aromatism level is zero, and in the ring C and D, relative to the A loop, the aromaticity increase is as follows: A > D> C In the next stage of the study, with the replacement of the halogen ring A from F to I, the following process was observed.In ring A, when halogens were changed, the increase in aromaticity in halogenated compounds was as follows: F> Cl> Br> I

Aromatism, ۱- (۴-fluorophenyl) -۲, ۳-dihydro-۱ H-naphto- [۱ and ۲-e] [۱ and ۳] oxazine-۳-n