Question

Which will react fastest in an sn2 mechanism?

Answer 1

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Basically, we are looking at a structure which has a weaker base (better leaving group) as one of its substituents and provides the least steric hindrance (has less bulky groups) to an incoming nucleophile for it to undergo SN2 reactions at a faster rate.

Answer 2

Answer:

Basically, we are looking at a structure which has a weaker base (better leaving group) as one of its substituents and provides the least steric hindrance (has less bulky groups) to an incoming nucleophile for it to undergo SN2 reactions at a faster rate.