The correct order of increasing basic nature for the bases NH_3, CH_3NH_2 and (CH_3)_2NH is

JEE Main 2003 Chemistry question

The correct order of increasing basic nature for the bases , and is

(1)(CH_3)_2NH < NH_3 < CH_3NH_2
(2)NH_3 < CH_3NH_2 < (CH_3)_2NHCorrect
(3)CH_3NH_2 < (CH_3)_2NH < NH_3
(4)CH_3NH_2 < NH_3 < (CH_3)_2NH

Answer: (2)

Solution

Methyl groups are electron-releasing (+I), increasing the electron density on N; in aqueous solution, solvation also favours these secondary/primary amines.

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Question ID VK-038210