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Solvatochromism of Heteroaromatic Compounds: XXVI. Solvent Effect on the Solvatochromic Parameters of IR Bands of N-Methylanilines and Related Hydrogen Bond Donors

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Abstract

Formation of a hydrogen bond between molecules of a proton donor (phenol, pyrrole, N-methylanilines) and a solvent decreases the sensitivity of the XH stretching frequency to the polarity/polarizability of solvents. A change in the bond configuration in the amine moiety of N-methylaniline and related compounds upon formation of a solvation H complex is manifested in that the absolute terms of the solvatochromic equations for inert and protophilic media are different. The spectroscopic effect from the geometric reorganization of molecules is determined by their structure and the capability to act as hydrogen bond donors. Multicentered hydrogen bond with π bases affects the geometry of the amine fragment of N-substituted anilines to a lesser extent than does two-centered H bond with onium bases.

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Authors and Affiliations

  1. Favorskii Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia

    A. I. Vokin, L. P. Oznobikhina, A. M. Shulunova, M. V. Ustinov, G. V. Bozhenkov, G. G. Levkovskaya & V. K. Turchaninov

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  1. A. I. Vokin
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  2. L. P. Oznobikhina
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  3. A. M. Shulunova
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  4. M. V. Ustinov
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  5. G. V. Bozhenkov
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  6. G. G. Levkovskaya
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  7. V. K. Turchaninov
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__________

Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 4, 2005, pp. 642–649.

Original Russian Text Copyright © 2005 by Vokin, Oznobikhina, Shulunova, Ustinov, Bozhenkov, Levkovskaya, Turchaninov.

For communication XXV, see [1].

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Vokin, A.I., Oznobikhina, L.P., Shulunova, A.M. et al. Solvatochromism of Heteroaromatic Compounds: XXVI. Solvent Effect on the Solvatochromic Parameters of IR Bands of N-Methylanilines and Related Hydrogen Bond Donors. Russ J Gen Chem 75, 605–612 (2005). https://doi.org/10.1007/s11176-005-0280-4

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  • DOI: https://doi.org/10.1007/s11176-005-0280-4

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