(b) Give mechanism of the following reactions:(i) Birch reduction

Question

(b) Give mechanism of the following reactions:

(i) Birch reduction

(ii) Wittig reaction

(iii) Dehydrohalogenation of alkyl halides

21 Jan 2021

Answer :

Word Count : 304

(i) Birch Reduction:
The Birch reduction is a chemical reaction that is used to reduce aromatic compounds, typically aromatic rings with a benzenoid structure, into cyclic, conjugated dienes or alkenes. It is carried out using liquid ammonia (NH3) and an alkali metal such as sodium (Na) or lithium (Li) as a reducing agent. The mechanism involves the formation of radical anions and subsequent electron transfer steps. Here is a simplified mechanism:

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