The reactions of aldehydes and ketones with ammonia derivative G-NH3 to form compounds containing >C=N-C and water is known as _ reaction.
Correct answer: D. Addition elimination
- A. Nucleophilic addition
- B. Nucleophilic substitution
- C. Electrophilic addition
- D. Addition elimination
Explanation
This reaction is called an addition-elimination reaction since a water molecule is eliminated from the reaction whereas the lone pair of electrons on Nitrogen form a dative bond with the electron-deficient carbon of aldehydes and ketones, thus adding it across the carbon.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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About Nucleophilic Addition Reactions
Nucleophilic addition occurs at the polar carbonyl group of aldehydes and ketones, where a nucleophile attacks the electron-deficient carbon atom. Reactions with hydrogen cyanide, sodium bisulfite, alcohols and Grignard reagents are explained through tetrahedral intermediates, acid or base catalysis, and the different reactivity of aldehydes and ketones.
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