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Explain the mechanism of addition of HCN to a carbonyl group in presence of a base. |
Answer» Solution : The mechanism of addition of HCN to carbonyl group takes PLACES ACCORDING to the following steps. Step - (1) : Addition of nucleophilic `(CN^(-))` to carbonyl carbon. The nucleophilic attacksthe `sp^(2)` hybridised carbonyl carbon ATOM forming tetrahedral alkoxide intermediate PRODUCT.  Step - (2) : Addition of proton of alkoxide ion. Alkoxide ion intermediate product picks up a proton from the reaction medium to form the ELECTRICALLY neutral final product. 
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