Question

Strength of acid increases with the attachment of group showing –I effect and decreases with the attachment of group showing +I effect. Which of the following is correct sequence of basic strength in aqueous solution ?

(a) CH3NH2 < (CH3)2NH < (CH3)3N

(b) (CH3)2NH < CH3NH2 < (CH3)3N

(c) (CH3)3N < (CH3)2NH < CH3NH2

(d) (CH3)3N < CH3NH2 < (CH3)2NH

Answer 1

Correct Option (d) (CH3)3N < CH3NH2 < (CH3)2NH

Explanation :

Such order of basic strength is weighted result of these three factors

(a) Inductive effect

(b) Solvation effect

(c) Steric hindrance