Question
Chemistry Question on Aldehydes, Ketones and Carboxylic Acids
For an SN2 reaction, arrange the following alkyl halides in increasing order of reactivity:
(A) CH3CH2CH2CH2
(B) CH3CH2CH(Br)CH3
(C) (CH3)3
(D) (CH3)2CHCH2
A
(A) < (B) < (C) < (D)
B
(A) < (C) < (B) < (D)
C
(B) < (A) < (D) < (C)
D
(C) < (B) < (D) < (A)
Answer
(B) < (A) < (D) < (C)
Explanation
Solution
For SN2 reactions, primary alkyl halides react faster than secondary and tertiary halides. Therefore, the increasing order of reactivity is
(B) < (A) < (D) < (C)