A Esmaeili - Department of Chemistry, Education,Mahallat,Iran

There are different ways for investigation the aromaticites of the cyclic compound.One of thenew method is for investigation the aromaticites of the cyclic compounds like Hetrocyclics ofthe NICS index.The purpose of this article is to introduce NICS method for indication ofaromaticity ring Aniline and therefore comparison between aromaticity of Aniline molecularwith substitution CH3 ,Br and determining the effect of electron doner group and electronacceptor group and isomers,1,2-,1,3- and 1,4- Aniline in aromaticity. All of the calculationwere done by use of GUSSIAN09 software with method B3LYP and 6-311+G** basis set.