Question

Tautomerism will be exhibited by?

• A. $(C{H}_3{)}_{3}CNO$
• B. $(C{H}_3{)}_{2}NH$
• C. $R_{3}CN{O}_2$
• D. $RC{H}_{2}N{O}_2$

Answer 1

The correct option is D $RC{H}_{2}N{O}_2$

(A) (Refer to Image 1)

(B) $C{H}_3-NH-C{H}_3$

(C) (Refer to Image 2)

(D) (Refer to Image 3)

Structures A and B have no $\alpha$-hydrogen that is needed for tautomerism. So $A$ and $B$ will not exhibit tautomerism. But only D can exhibit tautomerism as it has $\alpha$-hydrogen.