In conversion of acid halides to Ester, pyridine is used to:
Correct answer: B. Consume HCl formed in the reaction
- A. Stabilize acid halides
- B. Consume HCl formed in the reaction
- C. Dehydrate alcohol
- D. Dehydrogenate acid halides
Explanation
This option is correct. During the reaction of acid halides with alcohols to form esters, hydrogen halide (such as HCl) is released as a byproduct. Pyridine, being a weak base, reacts with the HCl to form pyridinium chloride, effectively neutralizing the acid. This helps to shift the reaction equilibrium toward the formation of the ester.
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About Carboxylic Acid Derivatives
Carboxylic acid derivatives include acid halides, acid anhydrides, esters and amides, formed by replacing the hydroxyl group of a carboxylic acid. Their nomenclature, structures, preparation, hydrolysis and relative reactivity are linked through nucleophilic acyl substitution, which differs from the nucleophilic addition reactions of aldehydes and ketones.
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