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NEET CHEMISTRYAldehydes, Ketones and Carboxylic AcidsEasy

Question

Product 'P' in the following reaction is: R−Mg−X+CO2→dry\etherY→H3O+PR-Mg-X + CO_2 \xrightarrow{dry\ether} Y \xrightarrow{H_3O^+} P

A

RCHO

B

RCOOH

C

RCH2OH

D

RCOOR'

Step-by-Step Solution

The reaction of a Grignard reagent (R−Mg−XR-Mg-X) with carbon dioxide (CO2CO_2) is a standard method for the preparation of carboxylic acids.

  1. Nucleophilic Attack: The alkyl group (R−R^-) of the Grignard reagent acts as a nucleophile and attacks the electrophilic carbon of CO2CO_2 (O=C=OO=C=O).
  2. Intermediate: This forms an addition product, a salt of the carboxylic acid (R−COO−Mg+XR-COO^-Mg^+X).
  3. Hydrolysis: Upon acidification (hydrolysis with H3O+H_3O^+), the salt is converted into the corresponding carboxylic acid (RCOOHRCOOH).

R−Mg−X+O=C=O→R−C(OMgX)=O→H3O+R−COOHR-Mg-X + O=C=O \rightarrow R-C(OMgX)=O \xrightarrow{H_3O^+} R-COOH

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Aldehydes, Ketones and Carboxylic Acids. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAldehydes, Ketones and Carboxylic Acidsproductfollowingreactionxrightarrowdryxrightarrowho

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