Clemmensen reduction takes place in the presence of
Clemmensen reduction takes place in the presence of
Zn-Hg with HCl
LiAlH4
H2 and Pt as catalyst
Glycol with KOH
The Correct Option is A
Solution and Explanation
The Clemmensen reduction is a chemical reaction that is utilized to reduce ketones or aldehydes to their corresponding hydrocarbons. This reaction plays a crucial role in organic synthesis and is specifically effective with carbonyl compounds that are stable to acidic conditions. It involves the use of metallic zinc (Zn) amalgamated with mercury (Hg) in the presence of concentrated hydrochloric acid (HCl). The reaction mechanism primarily involves the reduction of the carbonyl group (C=O) to a methylene group (CH2) under the reductive environment provided by Zn-Hg/HCl.
In summary, the Clemmensen reduction specifically takes place in the presence of:
- Zn-Hg with HCl.
Thus, the correct option among the provided choices is Zn-Hg with HCl.
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Concepts Used:
Organic Chemistry – Some Basic Principles and Techniques - Reaction Mechanism
SN1 Reaction Mechanism:
SN1 reaction mechanism takes place by following three steps –
- Formation of carbocation
- Attack of nucleophile
- Deprotonation
SN2 Reaction Mechanism:
The SN2 reaction mechanism involves the nucleophilic substitution reaction of the leaving group (which generally consists of halide groups or other electron-withdrawing groups) with a nucleophile in a given organic compound.
Electrophilic Aromatic Substitution Reaction Mechanism:
The mechanism of an electrophilic aromatic substitution reaction contains three main components which are:
- A new sigma bond from C=C is formed during the reaction in the arene nucleophile.
- Due to the breaking of the C-H sigma bond, a proton is removed.
- The C=C bond is reformed and it restores the aromaticity of the compound.
Electrophilic Substitution Reaction Mechanism:
The electrophilic substitution reaction mechanism is composed of three steps, which will be discussed more below.
- Electrophile Generation
- Carbocation Formation
- Proton Removal