A) \[C{{H}_{3}}Br\]
B) \[{{C}_{2}}{{H}_{5}}Br\]
C) \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}Br\]
D) \[{{C}_{2}}{{H}_{5}}Br\]
Correct Answer: C
Solution :
Since, \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}Br\] on ionsation gives a resonance stabilised benzyl carbocation \[({{C}_{6}}{{H}_{5}}\overset{+}{\mathop{C{{H}_{2}}}}\,)\] therefore \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}Br\] is best for \[{{S}_{N}}1\] reaction.
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