This observation establishes that the peak is not influenced significantly by strong tageffects, thereby suggesting that it likely highlights a new hydrogen bonding arrangement in the cluster. The carbonyl stretch appears at 1761 cm -1 . This cluster has an equal number of G and SA, but the experimental spectrum shows that the OH S peak has a substantially lower intensity. While the intensities of IR peaks are not additive, this detail serves as evidence in support of a new bonding motif involving the bisulfate moieties of the cluster.