Ab Inito Calculations on Adipic Acid

Geometric optimization, vibrational spectra and GIAO (gauge including atomic orbital) C NMR, H NMR chemical shift calculations were carried out by using Hartree-Fock (HF) method and density functional method (B3LYP) with the 6-31G(d) basis set. These methods are proposed as a tool to be applied in the structural characterization of adipic acid, thus providing useful support in the interpretation of experimental NMR data and IR data. Parameters were related to the linear correlation plot of computed data versus experimental C NMR, H NMR chemical shifts values and IR data.