Neet Solved Paper 2015 Question 38
Question: Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?
Options:
A) _img/neet_solved_paper_2015_c_question_84_option_1_.png)
B) _img/neet_solved_paper_2015_c_question_84_option_2_.png)
C) _img/neet_solved_paper_2015_c_question_84_option_3_.png)
D) _img/neet_solved_paper_2015_c_question_84_option_4_.png)
E) None of the above
Show Answer
Answer:
Correct Answer: E
Solution:
- Allylic and benzylic halides show high reactivity towards $ S _{N}1 $ reaction further, due to greater stabilization of allyl and benzyl carbocations intermediates by resonance, primary allylic and primary benzylic halides show higher reactivity in $ S _{N}1 $ reactions than other simple primary halides. $ H _3C-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}},=CH-CH _2-Cl\overset{,}{\longleftrightarrow} $ $ \underset{{2^{o}},\text{-allyl}cation}{\mathop{H _3C-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}},-CH=CH _2}},\overset{,}{\longleftrightarrow},\underset{{1^{o}}\text{-allyl}cation}{\mathop{H _3C-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}},=CH-\overset{+}{\mathop{C}},H _2}}, $ Hence, it undergoes nucleophilic reaction readily.
