| Autor: |
Strashnikova, N., Sigalov, M., Korostova, S., Mikhaleva, A., Trofimov, B. |
| Zdroj: |
Russian Chemical Bulletin; 1993, Vol. 42 Issue 6, p1013-1015, 3p |
| Abstrakt: |
Protonation of 2-(2-furyl)-, 2-(2-thienyl)-, and 2-arylpyrroles by sulfuric acid in ethanol was studied using electronic absorption Spectroscopy in the UV and visible regions. Pyrroles with heteroaromatic substituents are protonated at the α-positions of pyrrole and the heterocycle, resulting in the appearance of additional long-wave spectral bands. In the series of 2-arylpyrroles protonation capability is determined by the electronic effect of the phenyl ring substituents. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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