| Autor: |
Demidov, S., Kuzina, S., Serous, L., Filonenko, Yu., Kim, I., Mikhailov, A. |
| Zdroj: |
Chemistry of Natural Compounds; September 1990, Vol. 26 Issue: 5 p571-575, 5p |
| Abstrakt: |
A high reactivity of the olefinic double bonds of the lignin (Lg) macromolecule in the reaction with molecular chlorine has been found which has permitted the chlorination of Lg to be carried out under cryogenic conditions at 150–250 K. The process takes place by a radical-chain mechanism with a length of the kinetic chain of approximately 1000 units. The bulk of the chlorine is consumed in the olefinic chains of the Lg. Other reaction products besides chlorolignin are hydrogen chloride and phenoxyl radicals, which have singlet ESR spectrum (ΔH=1.0−1.2 mT) and are retained in the chlorinated samples of Lg to ∼250 K. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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