Struktur der Blei(IV)-carboxylate und ihre Zersetzung über elektronenspinresonanz-spektroskopisch nachweisbare Radikalzwischenstufen
| Autor: | K. Heusler, H. Loeliger |
|---|---|
| Rok vydání: | 1969 |
| Předmět: |
Stereochemistry
Decarboxylation Radical Organic Chemistry Hydrogen atom abstraction Biochemistry Medicinal chemistry Catalysis Inorganic Chemistry chemistry.chemical_compound chemistry Carbonium ion Covalent bond Drug Discovery Carboxylate Physical and Theoretical Chemistry Absorption (chemistry) Benzene |
| Zdroj: | Helvetica Chimica Acta. 52:1495-1516 |
| ISSN: | 0018-019X |
| Popis: | The position of the asymmetric COO- vibration of lead4+ carboxylates (at 6.50 to 6.58 μ) clearly indicates the absence of covalent bonding between oxygen and lead. These salts show strong UV. absorption in the region of 220 to 270 nm which is assigned to a charge transfer from oxygen to lead. UV.-irradiation of lead4+ carboxylates at −196°C in a solid benzene matrix leads to decarboxylation and production of alkyl radicals which were identified by ESR. spectrometry. These radicals react in the solid matrix by hydrogen abstraction from the α-position of a neighbouring carboxylate. In solution however rapid oxidation to carbonium ions occurs. |
| Databáze: | OpenAIRE |
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