Rank the hydrogen atoms (H_a, H_b, H_c) prese | vedclass

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Question

(A) The acidic strength is directly proportional to the stability of the resulting conjugate base (anion).$1$. $H_c$ is located on the $\alpha$-carbon

Vedclass · Accepted Answer

$c > b > a$

Vedclass · Answer

(A) The acidic strength is directly proportional to the stability of the resulting conjugate base (anion).$1$. $H_c$ is located on the $\alpha$-carbon between two carbonyl groups (a $\beta$-dicarbonyl compound). The resulting anion is stabilized by resonance with both carbonyl groups.$2$. $H_b$ is on an $\alpha$-carbon adjacent to one carbonyl group. The resulting anion is stabilized by resonance with one carbonyl group.$3$. $H_a$ is on a terminal methyl group. The resulting anion has no resonance stabilization.Therefore,the order of acidic strength is $H_c > H_b > H_a$.

Rank the hydrogen atoms $(H_a, H_b, H_c)$ present in the following molecule in decreasing order of their acidic strength.

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