Which reagents are used for the Fischer esterification in the scheme?

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Multiple Choice

Which reagents are used for the Fischer esterification in the scheme?

Fischer esterification is an acid-catalyzed condensation between a carboxylic acid and an alcohol to form an ester and water. The key reagents are the alcohol and the carboxylic acid, with a strong acid like sulfuric acid used as a catalyst. The acid protonates the carboxyl carbon, making it more electrophilic so the alcohol can attack. After a series of proton transfers, water is expelled and the carbonyl reforms to give the ester. The sulfuric acid both speeds up the reaction and helps remove water, shifting the equilibrium toward the ester. Water is the byproduct, not a reagent in this scheme, and a base would not promote ester formation under these conditions. Reagents like acid chlorides can form esters too, but via a different route, not Fischer esterification.

Fischer esterification is an acid-catalyzed condensation between a carboxylic acid and an alcohol to form an ester and water. The key reagents are the alcohol and the carboxylic acid, with a strong acid like sulfuric acid used as a catalyst. The acid protonates the carboxyl carbon, making it more electrophilic so the alcohol can attack. After a series of proton transfers, water is expelled and the carbonyl reforms to give the ester. The sulfuric acid both speeds up the reaction and helps remove water, shifting the equilibrium toward the ester.

Water is the byproduct, not a reagent in this scheme, and a base would not promote ester formation under these conditions. Reagents like acid chlorides can form esters too, but via a different route, not Fischer esterification.

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