Consider the nucleophilic attacks given below. Select in each pai… - Vidyadip

MCQ

Consider the nucleophilic attacks given below. Select in each pair that shows the greater $S_{N^2}$ reaction rate.

A
$(A-I);(B-IV);(C-VI);(D-VIII)$
B
$(A-II);(B-III);(C-V);(D-VIII)$
✓
$(A-I);(B-III);(C-V);(D-VIII)$
D
$(A-I);(B-III);(C-V);(D-VII)$

✓

Answer

Correct option: C.

$(A-I);(B-III);(C-V);(D-VIII)$

c
$(A)$ $Br^{\ominus}$ is best $L.G.$ than $\begin{matrix}
O \\
|| \\
-O-C-Me \\
\end{matrix}$

$(B)$ $SH^{\ominus}$ is best $Nu^{\ominus}$ than $MeSH$

$(C)$ $Cl^{\ominus}$ is best $Nu^{\ominus}$ than $I^{\ominus}$ in $DMSO$

$(D)$ In polar protic solvent $I^{\ominus}$ is better $Nu^{\ominus}$ than $Cl^{\ominus}$

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