HUNSDIECKER REACTION PDF

Hunsdiecker Reaction is an Organic Reaction Named after a German Chemist Heinz Hunsdiecker. Learn about Hunsdiecker Reaction Mechanism with the Help . The Hunsdiecker Reaction is the reaction of a silver carboxylate with a halogen to form an The reaction involves a radical chain mechanism. Analogous to the Kolbe electrolysis reaction, the Hunsdiecker reaction (after Heinz Hunsdiecker, born in ) is a decarboxylation with a radical intermediate.

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Analogous to the Kolbe electrolysis reaction, the Hunsdiecker reaction after Heinz Hunsdieckerborn in is a decarboxylation with a radical intermediate. However, it is not an electrochemical reaction.

Hunsdiecker Reaction

The Hunsdiecker reaction takes place when a silver carboxylate is heated in C Cl 4 in the presence of hunsdiecekr. In the initial step of the Hunsdiecker reaction, the silver carboxylate is converted into an acyl hypobromite through the action of bromine. The main driving force of this reaction step is the precipitation of the extremely poorly soluble and stable silver bromide.

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Subsequently, a radical chain reaction occurs. The chain initiation is the homolytic cleavage of the relatively weak oxygen-bromine bond. This yields a carboxyl radical and a bromine atom.

Similar to the Kolbe electrolysis reaction, the carboxyl radical decarboxylates spontaneously. This is the first propagation step of the chain reaction.

The resulting alkyl radical, or hydrocarbon radical, abstracts a bromine atom from a further acyl hypobromite molecule.

In this second propagation step, an alkyl bromide – the product – is formed and a carboxyl radical is recovered, reactiion then once again acts as a starting product of the first propagation step.

Silver carboxylates, required as starting products for the Hunsdiecker reaction, may be obtained through conversion of the corresponding carboxylic acid with silver oxide. There are several variations of the Hunsdiecker reaction that are known, in which silver I carboxylate is, for instance, exchanged for thallium I carboxylate, or in which the carboxylic acid is directly treated with a combination of lead tetraacetate and halide ions chloride, bromide, or iodide.

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Reactions of Carboxylic Acids – Chemgapedia

Through the application of these reagents carboxylic acids are converted into alkyl chlorides and alkyl iodides, as well. Hunsdiecker Reaction Analogous to the Kolbe hunediecker reaction, the Hunsdiecker reaction after Heinz Hunsdieckerborn in is a decarboxylation with a radical intermediate. Preparation and assessment Course requirements Further learning units.

About the Learning Unit Authors Dr. Gregor Fels Translators Dr.

Carsten Biele More Information.