Question Detail

CHM 102 Introductory Reaction Mechanism and Kinetics Objective Question

Question

What is the correct order of stability for free radicals?
Options
A Methyl > Primary > Secondary > Tertiary
B Tertiary > Secondary > Primary > Methyl
Correct Answer
C Secondary > Tertiary > Primary > Methyl
D All are equally stable
Correct Answer

Option B is the correct answer.

Detailed Explanation

Free radical stability increases with alkyl substitution: tertiary > secondary > primary > methyl due to hyperconjugation and inductive stabilization.

Hint

More alkyl groups = more stable radical.

Question Info