Q. Among the following the weakest base is
A) $C_{6}H_{5}CH_{2}NH_{2}$
B) $C_{6}H_{5}CH_{2}NHCH_{3}$
C) $O_{2}NCH_{2}NH_{2}$
D) $CH_{3}NHCHO$
Explanation
(d)
Presence of electron withdrawing group like$\ - CN,\ - CHO,\ - NO_{2}$ etc decreases the electron density over N- atom of amines, and thus decreases their basic character as lone pair is less available for donation
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.