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Exercises: Radical bromination in benzylic position

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Exercise

Which of the following statements regarding benzyl radicals are correct?

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Benzyl radicals are more resonance-stabilized than allyl radicals are.

Benzyl radicals are less resonance-stabilized than allyl radicals are.

In benzyl radicals, the whole aromatic system plays a part in resonance stabilization.

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Exercise

Which of the following statements are correct?

Please make a choice.

Please make a choice.

correct

wrong

partly correct

This is the right answer

Benzylic bromination, which occurs without any illumination or continuous cooling and, possibly, with the help of a radical former, such as NBS, is typical of a radical mechanism.

Benzylic bromination, which occurs under illumination and boiling heat with the possible aid of a radical former, such as NBS, represents a radical mechanism.

The bromination of the aromatic nucleus follows an ionic mechanism.

The bromination of the aromatic nucleus, which requires no boiling heat, but a lewis acid catalyst instead, follows an ionic mechanism.

The bromination of the aromatic nucleus, which requires boiling heat and a lewis acid catalyst, is classified as an anionic mechanism.

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