Question

Choose the compound from the following that will react fastest by SN1 mechanism

Answer 1

SN1–E1 reactions are most rapid with tertiary alkyl halides, they occur more slowly with secondary alkyl halides, and they are never observed with primary alkyl halides.

Reactivity of alkyl halides in S

N

1 reactions:

tertiary >> secondary >> primary

Thus the order of reactivity

2-bromopropane > 1-bromopropane