A. The chemical equation involved in Clemmenson reduction is as follows:
This is the mechanism of the above reaction.
Note - 2e- is from zinc as it donates to form Zn2+.
The chemical equation of Hell-Volhard Zelinsky is as follows.
This is the mechanism of it.
This above reaction is known as Etard reaction
Note – A sigmatropic reaction in organic chemistry is a pericyclic reaction wherein the net result is one σ-bond is changed to another σ-bond in an uncatalyzed intramolecular reaction.
Following reaction takes place:
O=CH2–Cl CH2–COOH CH3–CH2–OH
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