NEET Chemistry Nucleophilic Addition MCQ Question
When hydrogen cyanide (HCN) reacts with an aldehyde to form a cyanohydrin, what is the hybridization state of the carbon atom in the intermediate alkoxide ion before it captures a proton? Assume the reaction occurs with 0.5 M HCN in the presence of a base catalyst.
sp2
sp3
sp
sp3d
Correct Answer
Detailed Explanation
During the nucleophilic addition of HCN to an aldehyde, the carbon atom in the carbonyl group undergoes a change in hybridization from sp2 to sp3 as it forms a tetrahedral alkoxide intermediate, before capturing a proton to form the cyanohydrin.
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