Identify the correct order of acidic strength | vedclass

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(B) The acidic strength of substituted phenols depends on the electronic effects of the substituents.$1$. $Para$-nitrophenol $(II)$ has a strong $-M$

Vedclass · Accepted Answer

$II > I > III$

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(B) The acidic strength of substituted phenols depends on the electronic effects of the substituents.$1$. $Para$-nitrophenol $(II)$ has a strong $-M$ (mesomeric) and $-I$ (inductive) effect from the $-NO_2$ group at the para position,which significantly stabilizes the phenoxide ion.$2$. $Ortho$-nitrophenol $(I)$ also has $-M$ and $-I$ effects,but it forms an intramolecular hydrogen bond,which slightly reduces the stability of the phenoxide ion compared to the para isomer.$3$. $Meta$-nitrophenol $(III)$ only exhibits the $-I$ effect because the $-M$ effect does not operate at the meta position. Therefore,it is the least acidic among the three.Thus,the correct order of acidic strength is $II > I > III$.

Identify the correct order of acidic strength for the following compounds:
$I$. Ortho-nitrophenol
$II$. Para-nitrophenol
$III$. Meta-nitrophenol

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Identify the correct order of acidic strength for the following compounds:$I$. Ortho-nitrophenol$II$. Para-nitrophenol$III$. Meta-nitrophenol