Question

The correct order in aqueous medium of basic strength in case of methyl substituted amines is :

• A. $NH _3> Me _3 N > MeNH _2> Me _2 NH$
• B. $Me _2 NH > Me _3 N > MeNH _2> NH _3$
• C. $Me _2 NH > MeNH _2> Me _3 N > NH _3$
• D. $Me _3 N > Me _2 NH > MeNH _2> NH _3$

Answer 1

Answer: (C)

$Me _2 NH > MeNH _2> Me _3 N > NH _3$

Answer 2

In aqueous medium basic strength is dependent on electron density on nitrogen as well as solvation of cation formed after accepting H+. After considering all these factors overall basic strength order is
Me2?NH>MeNH2?>Me3?N>NH3?