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Question
Arrange the following compounds in increasing order of rate of reaction towards nucleophilic substitution.
| (a) |  |
| (b) |  |
| (c) |  |
Options
(a) < (b) < (c)
(c) < (b) < (a)
(a) < (c) < (b)
(c) < (a) < (b)
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Solution
(a) < (c) < (b)
Explanation:
The presence of an electron-withdrawing group (−NO2) at the ortho and para position facilitates nucleophilic substitution. The effect of the presence of the electron-withdrawing group is very less at the meta position.
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