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  4. The first steps of SN 1 and SN 2 reactions are, respectively

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Q. The first steps of $SN ^1$ and $SN ^2$ reactions are, respectively

Haloalkanes and Haloarenes

Solution:

In $SN ^2$, there is only one step, and it is exothermic. But in $SN ^1$ there are two steps first step; is endothermic and second step is exothermic

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