Question

Which of the following reactions does not occur?

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

Oxidation of Alkyl Benzenes: When treated under strong oxidising conditions, benzylic-H systems are oxidised all the way to the carboxylic acid. The alkyl substituent can be methyl-, $1^o$ or $2^o$ alkyl.
$3^o$ alkyl are not oxidised because they lack a benzylic-H (Must have at ​least 1 benzylic hydrogen​.)
Option (d) doesnot have benzylic hydrogen thus it will not undergo oxidation. Hence option (d) is correct.