Chemistry - Carboxylic acid and their Derivatives Question with Solution | TestHub
Reaction which is correctly matched with it's major product is :
Options:
Answer:
Solution:
Question Explanation:
Identify which of the given organic reactions correctly shows the major product formed under the specified reaction conditions.
Concept:
This question is based on
1. Dehydration of dicarboxylic acids
2. Decarboxylation of beta-keto acids
3. Free radical halogenation (Bromination)
4. Free radical addition of HBr (via Anti-Markovnikov rule)
Solution:
Option (2) represents a geminal dicarboxylic acid at the beta-position relative to a carbonyl group (beta keto acid). Upon heating, such compounds readily lose CO2 via a cyclic transition state to form a stable ketone.
Other options are incorrect:
(1) Phthalic acid gives phthalic anhydride on strong heating.
(3) Bromination at 3° carbon of alkanes is preferred.
(4) Peroxide with HBr yields anti-Markovnikov (1-bromobutane) product.