The doubt about the conversion of the lactam in penicillin to an ester could be explained by option C: "Amides are less reactive than esters."

Here's why:

1. Amides and esters are both carboxylic acid derivatives. The difference between them lies in their reactivity towards nucleophiles, which is determined by the stability of their leaving groups.

2. Amides have nitrogen attached to the carbonyl carbon, while esters have an oxygen atom. Nitrogen is less electronegative than oxygen, which means that it holds onto its bonded electrons more tightly. This makes the nitrogen in amides a poorer leaving group than the oxygen in esters.

3. Because amides have poorer leaving groups, they are less reactive towards nucleophiles than esters. This means that it's harder for a reaction to occur that would convert an amide (like the lactam in penicillin) into an ester.

4. Therefore, early researchers might have found it implausible that the lactam in penicillin would convert to an ester because this would require the amide to react with a nucleophile, which is unlikely due to its low reactivity.

Question

The doubt about the conversion of the lactam in penicillin to an ester could be explained by option C: "Amides are less reactive than esters."

Here's why:

1. Amides and esters are both carboxylic acid derivatives. The difference between them lies in their reactivity towards nucleophiles, which is determined by the stability of their leaving groups.

2. Amides have nitrogen attached to the carbonyl carbon, while esters have an oxygen atom. Nitrogen is less electronegative than oxygen, which means that it holds onto its bonded electrons more tightly. This makes the nitrogen in amides a poorer leaving group than the oxygen in esters.

3. Because amides have poorer leaving groups, they are less reactive towards nucleophiles than esters. This means that it's harder for a reaction to occur that would convert an amide (like the lactam in penicillin) into an ester.

4. Therefore, early researchers might have found it implausible that the lactam in penicillin would convert to an ester because this would require the amide to react with a nucleophile, which is unlikely due to its low reactivity.

Knowee AI · Accepted Answer

The doubt about the conversion of the lactam in penicillin to an ester could be explained by option C: "Amides are less reactive than esters."

Here's why:

1. Amides and esters are both carboxylic acid derivatives. The difference between them lies in their reactivity towards nucleophiles, which is determined by the stability of their leaving groups.

2. Amides have nitrogen attached to the carbonyl carbon, while esters have an oxygen atom. Nitrogen is less electronegative than oxygen, which means that it holds onto its bonded electrons more tightly. This makes the nitrogen in amides a poorer leaving group than the oxygen in esters.

3. Because amides have poorer leaving groups, they are less reactive towards nucleophiles than esters. This means that it's harder for a reaction to occur that would convert an amide (like the lactam in penicillin) into an ester.

4. Therefore, early researchers might have found it implausible that the lactam in penicillin would convert to an ester because this would require the amide to react with a nucleophile, which is unlikely due to its low reactivity.

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