Question

When there is an electron-withdrawing group on a benzene ring (eg. compounds such as nitrobenzenebenzoic acid, acetophenone, etc, resonance structures can be drawn that indicate the positions on the benzene ring that are least nucleophilic (because they have a positive charge on the carbon at that position). Because these positions are much less nucleophilic, the substitution reaction will not occur here; instead, substitution will occur at the other position(s) on the ring. As a result, which position(s) are most nucleophilic on a benzene ring when there is an electron-withdrawing group on the benzene? (ie. At what position(s) will the substitution occur?) meta 0 ortho and para Ortho and meta ortho O meta and para para

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