why benzyllic halide and allilyic halide undergoes sn2 mechanism?

Dear Student

 

Allilic halides also undergo both SN1 and SN2 types of nucleophilic mechanisms. 

It easily undergoes SN2 mechanism, since it is a primary halide.As e know primary halides easily undergo SN1 pathway.

 

Same is the case with benzyllic halide. If it is 1⁰ benzyllic halide it will undergo SN2 mechanism.

While 2⁰and 3⁰ benzyllic halides undergo SN1 pathway of nucleophilic substitution.

we hope that clarifies your query.

Regards

Team

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