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Aryl halides are extremely less reactive towards nucleophilic substitution. Predict and explain the order of reactivity of the following compounds towards nucleophilic substitution. |
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Answer» Solution : The decreasing order of reactivity `(III) gt (II) gt (I)` Explanation: Nitro `(-NO_(2))` groups are electron WITHDRAWING in nature. They deactivate the ring and ALSO reduce the electron density on the carbon atom of C-X bond. As a result, the NUCLEOPHILE ATTACK becomes easier. this is related to the number of these `-NO_(2)` groups PRESENT in the ring and also their relative position. |
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