Abstract
The mechanism of molecular complex formation in liquid propionic acid and its solutions is investigated. The anisotropic component of the Raman band of the C=O stretching vibration of pure propionic acid consists of three bands with maxima at 1661, 1700, and 1753 cm−1. The effect of varying the concentrations of solvents such as CCl4, acetonitrile, and water on this vibration mode is studied. The mechanism of formation of molecular complexes in solutions is determined using DFT calculations at the B3LYP/6-311++G(d,p) level of theory. The AIM, RDG, and NCI topological analyses are also performed to investigate the intermolecular interactions in the complexes.
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