Assertion: In case of aryl halides, halogens are moderately deactivating. Reason: Halogens are ortho, para directing groups.

Question

Assertion: In case of aryl halides, halogens are moderately deactivating. Reason: Halogens are ortho, para directing groups. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Halogens are moderately deactivating. Because of their strong - I effect, overall electron density on benzene ring decreases. Due to resonance, the electron density on o- and p- positions is greater than that at the m-position hence, they are o- and p- directing groups.

Q. Assertion : In case of aryl halides, halogens are moderately deactivating. Reason : Halogens are ortho, para directing groups.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Halogens are moderately deactivating. Because of their strong $-$ $I$ effect, overall electron density on benzene ring decreases. Due to resonance, the electron density on $o$ - and $p$ - positions is greater than that at the m-position hence, they are $o$ - and $p$ - directing groups.

Q. Assertion : In case of aryl halides, halogens are moderately deactivating. Reason : Halogens are ortho, para directing groups.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Halogens are moderately deactivating. Because of their strong − I effect, overall electron density on benzene ring decreases. Due to resonance, the electron density on o- and p- positions is greater than that at the m-position hence, they are o- and p- directing groups.

Halogens are moderately deactivating. Because of their strong $-$ $I$ effect, overall electron density on benzene ring decreases. Due to resonance, the electron density on $o$ - and $p$ - positions is greater than that at the m-position hence, they are $o$ - and $p$ - directing groups.