Alcohol, Phenol and EtherHard

Question

The order of reactivities of the gollowing alkyl halides for a SN 2reaction is :

Options

A.RF > RCl > RBr > RI
B.RF > RBr > RCl > RI
C.RCl > RBr > RF > RI
D.RI > RBr > RF > RF

Solution

The order of strength of R - X bond R - I < R - Br < R - Cl < R - F thus the order of reactivity of alkyl halides in SN-1 or SN-2 reaction will be :
R - I > R - Br > R - Cl > R - F
Also I- is better leaving group.

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