Which among the following functional groups e | vedclass

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(A) The $-R$ effect (negative resonance effect) is shown by groups that withdraw electron density from the conjugated system through resonance. Among

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$-CHO$

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(A) The $-R$ effect (negative resonance effect) is shown by groups that withdraw electron density from the conjugated system through resonance. Among the given options,the aldehyde group $(-CHO)$ contains a $\pi$-bond between carbon and oxygen,where oxygen is more electronegative,allowing it to withdraw electrons via resonance. Therefore,$-CHO$ exhibits the $-R$ effect. Groups like $-Br$,$-OR$,and $-NHR$ possess lone pairs of electrons and typically exhibit the $+R$ effect.

Which among the following functional groups exhibits $-R$ effect?

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