Question

Which of the following undergoes substitution by the SN1 mechanism at the fastest rate?

Answer 1

It's between 2 and 3. But argue that double bond in 3 molecule is able to donate its pi electrons to the carbo-cation upon the dissociation of the Br- anion more about.

Answer 2

so b would be a better choice?

Answer 3

yaaa b is right i think!!!

Answer 4

thanks!