Theoretical studies of pyramidality of nitrogen in (2-Cyclohexyl-vinyl)-methyl-amine, (2-Cyclopentyl-vinyl)-methyl-amine, (2-Cyclobutyl-vinyl)-methyl-amine and (2-Cyclopropyl-vinyl)-methyl-amine

The structures A-H were optimized at the DFT-B3LYP/6-31G* theory level.[1] All the calculations were carried out using the Spartan ‘10 package.[3] Pramidality of nitrogen, the energetic and geometric parameters (bond length (Å), bond angle (°) and torsional angle (°)) of the structures were undertaken using a DFT-B3LYP/6- 31G* method. Theatrical study of 1HNMR and IR spectral have calculated. In Figure 1 the stability and bond angle have compared. In (2-Cyclopentyl-vinyl)-methyl-amine (C) high tendency of resonance nitrogen has seen