Somayeh Abravesh - Department of chemistry, Ardabil Branch, Islamic Azad University, Ardabil, Iran
Vahideh Hadigheh Rezvan - Department of chemistry, Ardabil Branch, Islamic Azad University, Ardabil, Iran

In this research work for any combination of N-alkyl Benzimidazolone and its complex with chromium (II) using Density functional theory (DFT) were studied [1,2]. In this work, the method and basic set 6-311G*/B3LYP was used. Molecules were initially optimized molecular orbitals HOMO and LUMO of its output were calculated energy difference was reported. Table1. LUMO and HOMO energy difference between the orbitals of the chromium complexes with ligands N-alkyl –Benzimidazolone at the B3LYP/6-311G.compoundE(LUMO)E(HOMO)Gap energy (ev) N-Benzimidazolone -0.49897 -0.57458 0.07561 N-methyl-Benzimidazolone -0.48767 -0.56499 0.07732 N-ethyl-Benzimidazolone -0.48121 -0.55999 0.07878 N-propyl-Benzimidazolone -0.47872 -0.55764 0.07892 N-buthyl-Benzimidazolone -0.47855 -0.53083 0.05228 N-isopropyl-Benzimidazolone -0.47818 -0.55650 0.07832 N-isobuthyl-Benzimidazolone -0.47872 -0.55439 0.07567 N-sec buthyl-Benzimidazolone -0.47577 0.55313- 0.07736 N-tert buthyl-Benzimidazolone -0.47377 -0.55156 0.07779