Abstract
The inductive constants of the corresponding heterocyclic fragments were calculated on the basis of data on the pKa values obtained by potentiometric titration of derivatives of indole, carbazole, 3-methylcarbazole, tetrahydrocarbazole, 6-methyltetrahydrocarbazole, and phenothiazine. The σR oconstant of the 9-carbazolyl group was also calculated. The enthalpy and entropy of acidic dissociation were calculated from data on the effect of the temperature on the pKa of 9-carbazolylacetic acid. It is shown that the entropy contribution to the free energy of dissociation of 9-carbazolylacetic acid predominates.
| Original language | English |
|---|---|
| Pages (from-to) | 300-303 |
| Number of pages | 4 |
| Journal | Chemistry of Heterocyclic Compounds |
| Volume | 19 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 1983 |
ASJC Scopus subject areas
- Organic Chemistry
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Filippova, T. A., Sukhoroslova, M. M., Lopatinskii, V. P., & Filimonov, V. D. (1983). Acidic properties of N-hetarylacetic acids and inductive constants of N-hetaryl substituents. Chemistry of Heterocyclic Compounds, 19(3), 300-303. https://doi.org/10.1007/BF00513265