Abstract
We have measured the IR Fourier-transform spectra of biologically active benzaldehyde and its derivatives in the gas and liquid phases. For compounds of this class, the role played by C=O, OH, and CH groups in intra- and intermolecular has been analyzed. We have revealed spectral features that characterize the participation of C=O groups of unsubstituted benzaldehyde molecules in the occurrence of intermolecular hydrogen bonds C=O...H-C with the formation of molecular dimers of different types. For 2-hydroxybenzaldehyde molecules, spectral data have been obtained that are indicative of the occurrence of intramolecular hydrogen bonds of the C=O...H-C type in solutions. In 2-methoxybenzaldehyde molecules, no intramolecular hydrogen bonds have been observed.
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Original Russian Text © G.B. Tolstorozhev, I.V. Skornyakov, M.V. Bel’kov, O.I. Shadyro, S.D. Brinkevich, S.N. Samovich, 2012, published in Optika i Spektroskopiya, 2012, Vol. 113, No. 2, pp. 202–207.
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Tolstorozhev, G.B., Skornyakov, I.V., Bel’kov, M.V. et al. IR spectra of benzaldehyde and its derivatives in different aggregate states. Opt. Spectrosc. 113, 179–183 (2012). https://doi.org/10.1134/S0030400X12070247
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DOI: https://doi.org/10.1134/S0030400X12070247