Acidic properties of N-hetarylacetic acids and inductive constants of N-hetaryl substituents
| Parent link: | Chemistry of Heterocyclic Compounds Vol. 19, iss. 3.— 1983.— [P. 300-303] |
|---|---|
| その他の著者: | , , , |
| 要約: | Title screen 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 σRoconstant 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. Режим доступа: по договору с организацией-держателем ресурса |
| 言語: | 英語 |
| 出版事項: |
1983
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| 主題: | |
| オンライン･アクセス: | http://dx.doi.org/10.1007/BF00513265 |
| フォーマット: | 電子媒体 図書の章 |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=654464 |
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| 200 | 1 | |a Acidic properties of N-hetarylacetic acids and inductive constants of N-hetaryl substituents |f T. A. Filippova [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 17 tit.] | ||
| 330 | |a 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 σRoconstant 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. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Chemistry of Heterocyclic Compounds | ||
| 463 | |t Vol. 19, iss. 3 |v [P. 300-303] |d 1983 | ||
| 610 | 1 | |a электронный ресурс | |
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| 701 | 1 | |a Filippova |b T. A. | |
| 701 | 1 | |a Sukhoroslova |b M. M. | |
| 701 | 1 | |a Lopatinskii |b V. P. | |
| 701 | 1 | |a Filimonov |b V. D. |c Russian chemist |c Professor of the TPU |f 1945- |g Viktor Dmitrievich |3 (RuTPU)RU\TPU\pers\26423 |9 12127 | |
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