What is the order of acidic strength for the | vedclass

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(A) The acidic strength of phenols depends on the stability of the phenoxide ion formed after the loss of a proton. Electron-withdrawing groups $(EWG)

Vedclass · Accepted Answer

$I < II < IV < III$

Vedclass · Answer

(A) The acidic strength of phenols depends on the stability of the phenoxide ion formed after the loss of a proton. Electron-withdrawing groups $(EWG)$ increase acidity by stabilizing the negative charge,while electron-donating groups $(EDG)$ decrease acidity by destabilizing it.$I$: $p$-cresol ($-CH_3$ is an $EDG$,which decreases acidity).$II$: Phenol (reference compound).$III$: $p$-nitrophenol ($-NO_2$ is a strong $EWG$ at the para position,providing both $-I$ and $-M$ effects,making it the most acidic).$IV$: $m$-nitrophenol ($-NO_2$ is an $EWG$ at the meta position,providing only $-I$ effect,making it less acidic than $p$-nitrophenol but more acidic than phenol).Comparing the effects:$p$-cresol $(I)$ Thus,the correct order is $I < II < IV < III$.

What is the order of acidic strength for the following compounds?

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