FTIR spectra of pharmacologically active molecules of benzoic acid and its derivatives have been measured in CCl4 solutions and in microcrystals. Features of the formation of intra-and intermolecular hydrogen bonds have been analyzed. Spectral attributes have been revealed that characterize the participation of a carboxyl group in different types of intermolecular interactions with the formation of cyclic, linear, and criss-cross dimers. Mechanisms of the intermolecular interactions are shown to be defined by the character of the substituents attached to the benzene ring in the para- and meta-positions relative to the carboxylic group.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 78, No. 6, pp. 851–858, November–December, 2011.
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Belkov, M.V., Brinkevich, S.D., Samovich, S.N. et al. Infrared spectra and structure of molecular complexes of aromatic acids. J Appl Spectrosc 78, 794–801 (2012). https://doi.org/10.1007/s10812-012-9535-0
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DOI: https://doi.org/10.1007/s10812-012-9535-0