Which among the following is the strongest o, | vedclass

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(A) The strength of an $o, p-$directing group is determined by its ability to donate electron density to the benzene ring via the resonance effect ($+

Vedclass · Accepted Answer

$OH$

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(A) The strength of an $o, p-$directing group is determined by its ability to donate electron density to the benzene ring via the resonance effect ($+R$ or $+M$ effect).Among the given options:$1$. $-OH$ has a strong $+R$ effect due to the lone pair on oxygen,making it a powerful activating group.$2$. $-Cl$ and $-Br$ are deactivating groups due to their strong $-I$ effect,although they are $o, p-$directing due to the $+R$ effect.$3$. $-C_6H_5$ (phenyl group) is an activating group but is weaker than $-OH$ in terms of electron donation to the ring.Therefore,$-OH$ is the strongest $o, p-$directing group among the choices provided.

List-$I$ (Compound)	List-$II$ $(pK_a)$
$A$. $p-$Nitrophenol	$I$. $7.1$
$B$. Phenol	$II$. $10.0$
$C$. Ethanol	$III$. $15.9$
$D$. $p-$Cresol	$IV$. $10.2$

Which among the following is the strongest $o, p-$directing group?

Similar Questions

Match the following:
List-$I$ (Compound) List-$II$ $(pK_a)$
$A$. $p-$Nitrophenol $I$. $7.1$
$B$. Phenol $II$. $10.0$
$C$. Ethanol $III$. $15.9$
$D$. $p-$Cresol $IV$. $10.2$
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