Question
Download Solution PDFC6H5COCH3 → C6H5CH2CH3
The above reaction can be achieved using:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
Wolff–Kishner Reduction
- The Wolff–Kishner reduction is a chemical reaction that reduces carbonyl groups (such as aldehydes and ketones) to the corresponding alkanes.
- This reaction involves hydrazine (NH2NH2) in the presence of a strong base and high temperature.
- The reaction mechanism involves the formation of a hydrazone intermediate, which is then decomposed to yield the alkane product.
EXPLANATION:
- In the given reaction:
C6H5COCH3 → C6H5CH2CH3
- C6H5COCH3 is acetophenone (a ketone).
- C6H5CH2CH3 is ethylbenzene (an alkane).
- To reduce the ketone (C=O group) to an alkane, the Wolff–Kishner reduction is an appropriate method.
- The reactant NH2NH2 (hydrazine) is used in this process to achieve the reduction.
- Other methods like Sn/HCl, Friedel–Crafts reaction, and LiAlH4 are not suitable for this transformation:
- Sn/HCl is used for the reduction of nitro groups.
- Friedel–Crafts reaction is used for alkylation or acylation of aromatic compounds, not for reducing ketones.
- LiAlH4 reduces ketones to alcohols, not alkanes.
Therefore, the correct answer is option 1: NH2NH2.
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