Question

Which would undergo SN

2 reaction faster in the following pair :

C H -CH -CH -Br and C H -CH-CH 6 5 2 2 6 5 3

-

Br
​

Answer 1

Answer:

CH3 – CH2 – I would undergo an SN2 reaction faster than CH3 – CH2 – Br. Since iodine is a better leaving group because of its large size, it will be released at a faster rate in the presence of an incoming nucleophile as compared to bromine.