THE <sup>13</sup>С NMR, UV AND IR ABSORPTION SPECTRA OF PYRIDINEDICARBOXYLIC ACIDS

Authors

  • L. Wasylina Department of Organic Chemistry, University of Economics Wroclaw
  • E. Kucharska Department of Organic Chemistry, University of Economics Wroclaw
  • Z. Węgliński Department of Organic Chemistry, University of Economics Wroclaw
  • A. Puszko Department of Organic Chemistry, University of Economics Wroclaw

DOI:

https://doi.org/10.1007/531

Abstract

The 13С NMR, UV and IR absorption spectra of 2,3-, 2,4-, 2,5-, 2,6-, 3,4- and 3,5-pyridinedicarbохуlic acids were recorded and their spectral parameters were assigned. The influence of electronic properties of the substituents on the direction of the chemical shifts is discussed. The ultraviolet absorption spectra of the title compounds were recorded. The influence of substituents in molecule on λmax and εmax of spectral band are disscused. Оn the base of 13С NMR, UV and IR absorption spectra it was found that there is a disturbance of mutual electronic interaction of substituents by a steric ortho effect. This effect is reflected in paramagnetism of the carboxyl group, value of correlation coefficient, deformation С–О stretching bands and decrease of intensity of CT band.

Also published in Chemistry of Heterocyclic Compounds, 1999, 35 (2), pp 186-194

http://link.springer.com/article/10.1007/BF02251707

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Published

2013-04-26

Issue

No. 2 (1999)

Section

Original Papers