A) \[{{C}_{p}}-{{C}_{y}}=R\]
B) \[{{C}_{p}}-{{C}_{y}}=28R\]
C) \[{{I}_{1}}\]
D) \[{{I}_{2}}\]
Correct Answer: B
Solution :
\[{{S}_{N}}2\]reactions are greatly controlled by steric factor. \[\begin{align} & R-C{{H}_{2}}-X>{{R}_{2}}CH-X>{{R}_{3}}C-X \\ & \,\,\,\,\,\,\,\,\,\,\,\,{{1}^{o}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{2}^{o}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{3}^{o}} \\ \end{align}\] \[{{S}_{N}}2\]reactivity decreases as bulkyness of alkyl group increases.
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