How it is possible to rank radical stability?

1 Answer
Oct 2, 2015

The stability of radicals on the carbon atom increase with the increase of its degree (1st,2ndand3rd).

Explanation:

The stability of radicals on the carbon atom increase with the increase of its degree (1st,2ndand3rd).

For example, R3C is more stable than R2HC which is more stable than RH2C.
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Alkyl groups are consider electron donating groups through inductive effect , and this will increase the stability of the radical in a similar way the stabilizes a carbocation.

Image source: Organic Chemistry-Janice Gorzynski Smith 3rd Ed .