Choose from the indicated protons, the one that is most acidic

Question

Choose from the indicated protons, the one that is most acidic <img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/c-8nluabxe6n3w.png" /> (A) 1 (B) 2 (C) 3 (D) 4

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/c-8nluabxeaktl.png" /> Deprotonation of hydrogen labelled 4 produces a conjugate base which has more stable resonating structure and a resonance structure in which negative charge is present on the electronegative oxygen atom. Therefore, hydrogen labelled 4 is most acidic.

Q. Choose from the indicated protons, the one that is most acidic

$1$

$2$

$3$

$4$

Deprotonation of hydrogen labelled $4$ produces a conjugate base which has more stable resonating structure and a resonance structure in which negative charge is present on the electronegative oxygen atom. Therefore, hydrogen labelled $4$ is most acidic.