Normal-Coordinate Treatment of Acetic Acid Monomer and Dimer

Abstract
A normal‐coordinate treatment was carried out for acetic acid monomer, dimer, and their deutero analogs. All of the in‐plane and out‐of‐plane vibrations were calculated using a modified Urey–Bradley force field. On the basis of the calculated frequencies and the potential‐energy distributions, assignments of vibrational spectra were made for these substances.