Which of the following is the correct order of decreasing SN 2 reactivity?
(a) RCH2X > R3CX > R2CHX
(b) RCH2X > R2CHX > R3CX
(c) R3CX > R2CHX > RCH2X
(d) R2CH2 > R3CX > RCH2X
Correct Option**(b) RCH2X > R2CHX > R3CX**
Explanation:
SN2 reactions are greatly controlled by steric factor.
