Ailurophile03
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why is the answer not A
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Pigster
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(Original post by Ailurophile03)
why is the answer not A
Esterification of carboxylic acids is slow.

Esterification of acyl chlorides is fast.
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MedicPls
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(Original post by Pigster)
Esterification of carboxylic acids is slow.

Esterification of acyl chlorides is fast.
Could you please answer what is the reasoning behind esterification being faster/slower for the different options? I would have thought since 2 bonds need to be broken in the esterification of acyl chlorider (Cl bond & a H bond on the alcohol's O after it has attacked), as opposed to just 1 bond being broken on carboxylic acids (O-H bond), it would be a slower reaction with acyl chlorides.
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Pigster
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(Original post by MedicPls)
Could you please answer what is the reasoning behind esterification being faster/slower for the different options? I would have thought since 2 bonds need to be broken in the esterification of acyl chlorider (Cl bond & a H bond on the alcohol's O after it has attacked), as opposed to just 1 bond being broken on carboxylic acids (O-H bond), it would be a slower reaction with acyl chlorides.
They proceed by different mechanisms.

Carboxylic acids require an acid catalyst, whereas acyl chlorides do not. The mere requirement of a catalyst should suggest that the reaction isn't likely to be too fast.
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