Answer: 1,1-Dimethoxyethane (acetal).
- A 1,1-Dimethoxyethane (acetal)
- B Ethylene glycol as generally observed
- C Methyl acetate in typical laboratory settings
- D Dimethyl ether under usual circumstances
Correct answer: A. 1,1-Dimethoxyethane (acetal)
Explanation: Two moles of methanol add to acetaldehyde in acidic conditions to form the acetal 1,1-dimethoxyethane.
Curved arrows show the nucleophile attacking the carbonyl carbon while the C=O pi electrons move onto oxygen, giving a tetrahedral alkoxide intermediate.
Concept context
Aldehydes, ketones, carboxylic acids, and their derivatives (esters, amides, acid chlorides). Key reactions include nucleophilic addition, Aldol condensation, Cannizzaro, and Claisen. Very heavily tested in JEE and NEET.
Read the full Aldehydes, Ketones and Carboxylic Acids notes →