Which of the following is a correct statement regarding electrophilic aromatic s

Question

Which of the following is a correct statement regarding electrophilic aromatic substitution? Select one: The arenium ion intermediate will lose a hydrogen to regain aromaticity, usually from a position other than the site of attack. Formation of the arenium ion intermediate has a high activation barrier due to loss of aromaticity. The arenium ion intermediate has several resonance structures and is negatively charged. Reformation of the aromatic ring has a low activation barrier and therefore occurs slowly. Many suitable electrophiles are unreactive and can be stored for long periods of time prior to use.

Explanation / Answer

* 2. Formation of arenium ion intermediate has a high activation barrier due to loss of aromaticity.

Remaining are wrong. Because,

1. H is lost from the same carbon where electrophile attacks.

3. The arenium intermeidate has positive sign.

4. Reformation occurs fastly because of low activation energy barrier

5. Generally all electrophiles are more reactive. The reactivity of aromatic compound depends on the substituents present on the ring only.

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