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Question

Chemistry Question on Organic Chemistry- Some Basic Principles and Techniques

The least stable free radical is

A

CH3CHCH(CH3)2C{{H}_{3}}CHCH{{(C{{H}_{3}})}_{2}}

B

CH2CH2CH(CH3)2C{{H}_{2}}C{{H}_{2}}CH{{(C{{H}_{3}})}_{2}}

C

CH3C{{H}_{3}}

D

CH3CH2C(CH3)2C{{H}_{3}}C{{H}_{2}}C{{(C{{H}_{3}})}_{2}}

Answer

CH3C{{H}_{3}}

Explanation

Solution

As the number of alkyl groups attached to the carbon containing odd electron increases, number of hyperconjugative structures increases, and thus, the stability increases. CH3CH _{3} due to lack of alkyl group, attached to the C{ }^{\circ} C, is least stable.