Question

Which is the strongest base among the following

• A. $C_{6}H_{5}NH_{2}$
• B. $p-NO_{2}C_{6}H_{4}NH_{2}$
• C. $m-NO_{2}C_{6}H_{4}NH_{2}$
• D. $C_{6}H_{5}CH_{2}NH_{2}$

Answer 1

Answer: (D)

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.