1.

Which of the following two compounds would react faster by SN2 mechanism and Why?

Answer»

In SN2 mechanism, a pentacoordinate T.S. is involved. The order of reactivity of alkyl halides towards SN2 mechanism is. Primary > Secondary > Tertiary, (due to increasing crowding in T.S. from primary to tertiary halides.

1- Chlorobutane being primary halide will react faster by SN2 mechanism, than the secondary halide 2- chlorobutane.)



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