Each compound (1 mol) reacts with a large excess of $CH X_{3} MgBr$ to form the final tertiary alkoxide. Counting the acidic $O - H$ hydrogen as consuming 1 mol of Grignard, which statements are correct?

Adiethyl carbonate consumes 3 mol
Bethyl benzoate consumes 2 mol
Cbenzoic acid consumes 2 mol
Dethyl 4-hydroxybenzoate consumes 3 mol

Answer: A, B, D

Ester: 2 mol. Ethyl 4-hydroxybenzoate: 1 mol for the phenolic OH plus 2 mol for the ester, i.e. 3 mol. Diethyl carbonate: 3 mol. Benzoic acid: the first mole removes the acidic H, giving the unreactive carboxylate, which is not attacked further, so 1 mol, not 2.

Practice Organic Reaction Mechanisms I: Nucleophiles and Carbonyl Addition More on Nucleophilic acyl substitution of carboxylic acid derivatives

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Each compound (1 mol) reacts with a large excess of CHX3​MgBr to form the final tertiary alkoxide. Counting the acidic O−H hydrogen as consuming 1 mol of Grignard, which statements are correct?

Answer: A, B, D

More questions on Nucleophilic acyl substitution of carboxylic acid derivatives

Each compound (1 mol) reacts with a large excess of $CH X_{3} MgBr$ to form the final tertiary alkoxide. Counting the acidic $O - H$ hydrogen as consuming 1 mol of Grignard, which statements are correct?