"radical" nach Englisch mit Beispielen - Kollokationen-Wörterbuch Englisch
- Cross disproportionation occurs when two different alkyl radicals disproportionate to form two new products.
- Different products can be formed depending on which alkyl radical acts as a donor and which acts as an acceptor.
- When the alkyl radical is fully formed in the transition state it can benefit fully from any resonance stabilization present thereby maximizing selectivity.
- The nomenclature parallels that of alkyl radicals.
- In the primary reaction product the intermediate alkyl radical is then captured by the diazonium counterion X which is usually a halogen or a tetrafluoroborate.
- The alkyl radical will typically react rapidly with oxygen forming a peroxy radical.
- One electron from the metal is transferred to the halogen to produce a metal halide and an alkyl radical.
- The reaction of the alkyl radical with the ester carbonyl group is also a possibility but has an unfavorable activation energy.
- Likewise, radicals next to functional groups such as carbonyl, nitrile, and ether are more stable than tertiary alkyl radicals.
- It has been postulated that after electron transfer, immediate recombination of the fluorine radical with the alkyl radical takes place.
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