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Hyperconjugation

Which of the ...

Question

Which of the following orders is correct for no-bond-resonance energy of these radicals?

I > II > III

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III > II > I

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III > I > II

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II > III > I

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Solution

The correct option is A I > II > III
No. of $α - H \propto$ No. of bond resonance energy.
As refer to the above image as no. of $α - H$ decreases so the number of bond resonance energy also decreases.

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