Abstract
Calculations of infrared absorption intensity distributions for symmetrical OHO hydrogen bonds of varying length are reported, using a stochastic model and taking into consideration the double minimum potential function of the proton motion in the form V(r) = − Ar 2 + Br 4. A and B parameters were obtained from experimental correlations between r OH as well as v OH and O⋯O lengths. A gaussian-like statistical R OO distance distribution was assumed with a root mean square deviation corresponding to that of low frequency bridge stretching vibrations. Features of strong symmetrical hydrogen bonds such as continuous absorption and isotopic effect are discussed in terms of this stochastic model. The evolution of infrared absorption spectra from weak to strong hydrogen bonds is demonstrated.
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