The least stable free radical is

Question

The least stable free radical is (A) CH3 overset bulletCH2 (B) CH3CH2 overset bulletCH2 (C) (CH3)2 overset bulletCH (D) (CH2)3 overset bulletC

Tardigrade Admin · Accepted Answer

As the number of hyperconjugative structures (α- H atoms ) increases, stability of free radical increases. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/c9757ecde0a80e8a6c1e5944efe3b78c-.png" /> Since, overset bullet CH 3 has no hyperconjugative structure, so it is least stable.

Q. The least stable free radical is

$C H_{3} C ∙ H_{2}$

$C H_{3} C H_{2} C ∙ H_{2}$

$(C H_{3})_{2} C ∙ H$

$(C H_{2})_{3} C ∙$

$C ∙ H_{3}$

As the number of hyperconjugative structures $(α - H$ atoms $)$ increases, stability of free radical increases.

Since, $C H_{3} ∙$ has no hyperconjugative structure, so it is least stable.

Q. The least stable free radical is

CH3​C∙H2​

CH3​CH2​C∙H2​

(CH3​)2​C∙H

(CH2​)3​C∙

C∙H3​