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Explain the mechanism of nucleophilic addition reactions of aldehyde and ketone? |
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Answer» Solution :The carbonyl carbon carries a small degree of positive CHARGE. (ii) Nucleophile such as `CN^-`can attack the carbonyl carbon and uses its BOND pair to form a new carbon – nucleophile . `sigma`. bond, at the same time two electrons from the carbon – oxygen double bond move to the most electronegative oxygen atom. (iii)This results in the formation of an alkoxide ion. In this PROCESS, the hybridisation of carbon changes from spa to `sp^3`  The tetrahedral INTERMEDIATE can be protonated by water or an acid to form an ALCOHOL.. 
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