JEE MAIN - Chemistry (2020 - 3rd September Evening Slot - No. 9)
The decreasing order of reactivity of the
following compounds towards nucleophilic
substitution (SN2) is :
_3rd_September_Evening_Slot_en_9_1.png)
(IV) > (II) > (III) > (I)
(II) > (III) > (IV) > (I)
(II) > (III) > (I) > (IV)
(III) > (II) > (IV) > (I)
Explanation
_3rd_September_Evening_Slot_en_9_2.png)
–NO2 group present at ortho and para position deactivate the benzene ring and making the carbon attached to ring (–CH2Cl) group more electrophilic for the incoming nucleophile to give SN2 reaction but rate of SN2 reaction decreases as hindrence increases around the electrophilic carbon.
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