Vibrational Study and Force Field of the Citric Acid Dimer Based on the SQM Methodology

<table>Comparison between (a) the experimental infrared spectrum in solid state, (b) the calculated infrared spectrum from B3LYP/6-31G* level for the monomer, and (c) the calculated infrared spectrum obtained from B3LYP/6-31G* level using average frequencies and intensities for both monomer and dimer species.</table>

Advances in Physical Chemistry

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Figure 2

Figure 2: Vibrational Study and Force Field of the Citric Acid Dimer Based on the SQM Methodology 