The correct order of basic nature on aqueous solution for the bases NH3, H2N-NH2, CH3CH2NH2, (CH3CH2)2 NH and (CH3CH2)3 N is:

Question

The correct order of basic nature on aqueous solution for the bases \(NH_3, H_2 N - NH_2, CH_3CH_2 NH_2, (CH_3CH_2)_2NH \text{ and } (CH_3CH_2)_3N\) is:

(1) \(NH_3 < H_2 N - NH_2 <(CH_3 CH_2)_3N < CH_3 CH_2 NH_2 < (CH_3CH_2)_2NH\)

(2) \(NH_3 < H_2 N - NH_2 < CH_3CH_2NH_2 < (CH_3CH_2) _2 NH < (CH_3CH_2)_3 N\)

(3) \(H_2N - NH_2 < NH_3 < (CH_3CH_2)_3N < CH_3CH_2NH_2<(CH_3CH_2)_2 NH\)

(4) \(NH_2 - NH_2 < NH_3 < CH_3CH_2 NH_2 < (CH_3CH_2)_3 N < (CH_3CH_2)_2NH\)

Answer 1

Correct option is:  (4) \(NH_2 - NH_2 < NH_3 < CH_3CH_2 NH_2 < (CH_3CH_2)_3 N < (CH_3CH_2)_2NH\)

Basic strength of amine depends on hydrogen bonding and electronic inductive effect

\(NH(Et)_2 > N(Et)_3 > NH_2Et > \ddot{N}H_3 > NH_2 - NH_2\)