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Question
Increasing order of reactivity of CH3CHO,CH3COC2H5 and CH3COCH3 towards nucleophilic addition is:
Increasing order of reactivity of CH3CHO,CH3COC2H5 and CH3COCH3 towards nucleophilic addition is:
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Solution
The correct option is A CH3CHO>CH3COCH3>CH3COC2H5
Aldehydes are more reactive than ketones towards nucleophiles due to following reason:.
1. Aldehydes tend to me more reactive to nucleophilic addition than ketones due to steric hinderance. Ketones have two alkyl groups attached to their carbonyl carbon while aldehydes only have one. This means nucleophiles have a less sterically hindered path when attacking the carbonyl carbon of an aldehyde.
2. Two alkyl groups in ketones reduce the electrophilicity of the carbonyl carbon more effectively than in aldehyde.
Hence Aldehydes are more reactive toward nucleophilic addition reactions than Ketones.
As the number and the size of the alkyl group increases, reactivity decreases. Hence, the correct answer is option (a).
Aldehydes are more reactive than ketones towards nucleophiles due to following reason:.
1. Aldehydes tend to me more reactive to nucleophilic addition than ketones due to steric hinderance. Ketones have two alkyl groups attached to their carbonyl carbon while aldehydes only have one. This means nucleophiles have a less sterically hindered path when attacking the carbonyl carbon of an aldehyde.
2. Two alkyl groups in ketones reduce the electrophilicity of the carbonyl carbon more effectively than in aldehyde.
Hence Aldehydes are more reactive toward nucleophilic addition reactions than Ketones.
As the number and the size of the alkyl group increases, reactivity decreases. Hence, the correct answer is option (a).
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