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Chapter 15: Q31. (page 570)

Question: Rank the following radicals in order of increasing stability.

Short Answer

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Answer

The rank of the given radicals in the increasing order of stability is as follows:

Step by step solution

01

Stability

The stability of the carbon radical is explained by allylic, 3020,and 10 alkyl carbon radicals.A dot on the carbon represents a carbon radical.

02

Rank of increasing stability

Structure A is stable due to the presence of an allylic carbon radical. Structure B is stable due to the presence of a 30carbon radical, and structure C is stable due to the presence of a 20carbon radical.

The allylic carbon radical is stabilized by resonance

Resonance structure

The30 carbon radical is more stable than 20 carbon radical because it is stabilized through the electronic effects of other groups attached. In this case, hyperconjugation occurs.

That’s why structure B is more stable than structure C.

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