1 Explain the difference in acidity between pcyanoanilinium

1. Explain the difference in acidity between p-cyanoanilinium ion and anilinium ion with words and structures.

2. Explain the difference in acidity between p-aminoanilinium ion and anilinium ion with words and structures.

Solution

THE CYANO GROUP IS AN ELECTRON WITHDRAWING GROUP AND HENCE WILL NOT ALLOW THE EASY ESCAPE OF h+ ION FROM MOLECULE HENCE ITS ACIDITY IS SMALLER AS COMPARED TO THE anilinium ion .STRONG ACID IS ONE WHICH READILY GIVES H+........THE REVERSE THING HAPPENS IN OTHER CASE ..THE AMMINO GROUP HAS ELECTRON DONATING EFFECT AND WLII STABILISE THE LOSS OF H+ BY RESONANCE AND HENCE IN THIS CASE THE p-aminoanilinium ion IS MORE ACIDIC THAN anilinium ioN