Haloalkanes and Haloarenes
Which of the following is most reactive towards nucleophilic substitution?
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Single Choice
The decreasing order of $$ArS_N$$ reaction with $${C}_{2}{H}_{5}{O}^{\ominus }/EtOH$$ is:
A$$(I)>(II)>(III)>(IV)$$
B$$(IV)>(III)>(II)>(I)$$
C$$(III)>(IV)>(II)>(I)$$
Correct Answer
D$$(IV)>(III)>(I)>(II)$$
Solution
In $$ArS_N$$, the electron withdrawing group activates the ring and make easier for nucleophile to attack. So, the most electron withdrawing group is III. Second most electron withdrawing group is $$IV$$.
On comparing $$I$$ and $$II$$, $$Me$$ has $$+I$$ effect and $$Cl$$ has $$-I$$ effect so, $$Cl$$ activates the ring towards nucleophilic attack.
SIMILAR QUESTIONS
Haloalkanes and Haloarenes
Which of the following undergoes nucleophilic substitution exclusively by $$S{_N}{1}$$ mechanism?
Haloalkanes and Haloarenes
Which of the following is most reactive towards aqueous $$NaOH$$?
Haloalkanes and Haloarenes
Which of the following compounds undergo nucleophilic substitution reactions?
Haloalkanes and Haloarenes
The nucleophilic substitution of primary alkyl chlorides with sodium acetate is catalysed by sodium iodide. Explain why.
Haloalkanes and Haloarenes
The decreasing order of nucleophilicities of the following is: $$(I)Br^{\ominus }(II)MeO^{\ominus }(III)Me_2N^{\ominus }(IV)Me_3C^{\ominus }$$
Haloalkanes and Haloarenes
The major product $$(C)$$ in the reaction is:
Haloalkanes and Haloarenes
Product $$(B)$$ is:
Haloalkanes and Haloarenes
Which of the following statements are correct for the above reaction?
Haloalkanes and Haloarenes
Which of the following compounds will sow faster $$Ar{S_N}{2}$$ reaction?
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