question_answer

Consider the following compounds:  Basic nature of above compounds is in the order as:

A) I > II > III        

B) I > II > III

C) II > III > I                    

D) III > II > I

Correct Answer: A

Solution :

[a]

Basic nature of a compound depends upon the ease with which it can donate its unshared pair of electrons.

I. electron donating group. (Maximum basic)

II. electron withdrawing. The lone pair of N is involved in resonance with \[C{{H}_{3}}CO.\]

III. Lone-pair of N-atom is also used in delocalization of \[\pi -\]electrons, resonance of carbonyl benzene nucleus (least basic)

Thus, the correct order of basic nature of given compounds are as follows: I > II > III.