Question

2-Methylpropane on monochlorination under photochemical condition gives:

• A. 2-Chloro-2-methylpropane as major product.
• B. (1:1) Mixture of 1-chloro-2-methylpropane and 2-chloro-2-methylpropane.
• C. 1-Chloro-2-methylpropane as major product.
• D. (1:9) Mixture of 1-chloro-2-methylpropane and 2-chloro-2-methylpropane.

Answer 1

The correct option is C 1-Chloro-2-methylpropane as major product.

There are nine primary hydrogen and one tertiary hydrogen in 2-methyl propane.

Tertiary hydrogen atoms react with $Cl$ about $5.5$ times as fast as primary. Even though the primary hydrogen are less reactive, there are so many of them that the primary product is the major product.

Option C is correct.