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Acid–Base Interactions in the Dichloroacetic Acid–N,N-Dimethylformamide System as Found from IR Spectroscopic Data

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Abstract

Ion–molecule interactions in the dichloroacetic acid–N,N-dimethylformamide system in the concentration range from pure acid to pure base at 30°C were investigated by multiple attenuated total internal reflectance IR spectroscopy. It was found that, depending on the ratio between components in solution, 1 : 1 or 2 : 1 acid–base complexes with strong hydrogen bonds are formed. With an excess of the acid, protonation of the base does not occur. The intensity of continuous absorption at 2000 cm–1 is characteristic of quasi-ionic pairs with strong symmetrical hydrogen bonds. However, along with a continuous component, the spectra exhibited individual sharp peaks, which are typical of molecular complexes.

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Authors and Affiliations

  1. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia

    V. D. Maiorov, G. I. Voloshenko & N. B. Librovich

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  1. V. D. Maiorov
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  2. G. I. Voloshenko
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  3. N. B. Librovich
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Maiorov, V.D., Voloshenko, G.I. & Librovich, N.B. Acid–Base Interactions in the Dichloroacetic Acid–N,N-Dimethylformamide System as Found from IR Spectroscopic Data. Kinetics and Catalysis 45, 634–639 (2004). https://doi.org/10.1023/B:KICA.0000044973.89588.72

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  • DOI: https://doi.org/10.1023/B:KICA.0000044973.89588.72

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