Ma. Palafox, VIBRATIONAL ANALYSIS AND GEOMETRY OPTIMIZATION OF A LOCAL-ANESTHETIC BY MEANS OF THE AM1 SEMIEMPIRICAL METHOD, Spectroscopy letters, 30(6), 1997, pp. 1089-1108
The semiempirical method AM1 was used to optimize the geometric parame
ters: bond lengths, bond angles and torsional angles in the local anes
thetic benzocaine hydrochloride. The frequencies and intensities of th
e normal modes were computed. These results were compared with the inf
rared and Raman spectroscopic data. A theoretical spectrum using sever
al scale coefficients was plotted. Electron density maps in two and th
ree dimensions were drawn. Several calculated thermodynamic parameters
are discussed.