Organic Chemistry Basics 2 Question 39
39. Among the following, the strongest base is
(2000)
(a) $\mathrm{C}{6} \mathrm{H}{5} \mathrm{NH}_{2}$
(b) $p-\mathrm{NO}{2} \mathrm{C}{6} \mathrm{H}{4} \mathrm{NH}{2}$
(c) $m-\mathrm{NO}{2}-\mathrm{C}{6} \mathrm{H}{4} \mathrm{NH}{2}$
(d) $\mathrm{C}{6} \mathrm{H}{5} \mathrm{CH}{2} \mathrm{NH}{2}$
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Solution:
39.
Lone pair is not taking part in resonance, most basic. In other cases, lone pair of nitrogen is part of delocalisation which decreases Lewis base strength.
