Actually, anilinium is not meta directing (I know it is often taught that way), but rather it inductively deactivates the entire aromatic ring. As a result, the electron density at meta position is relatively higher than at the ortho and para position. 2: Thus, the nitro group is a meta directing group. The NH2 group contains lone pair so NH2 donate it to benzene ring ..... nd atom which donate electrons known as activating groups ... activating groups show electron density at ortho - para so that they called ortho - para directing groups the NO2 is electron withdrawing group as it no contains lone pair electron withdrawing group is known as. So, electron deficient electrophile always attacks at meta position.
Ortho, para directing groups are electron-donating groups; meta directing groups are electron-withdrawing groups. For example, -X, -O-, -OH, -OR, -OCO-R, -NH2, -NHR, -NHCOR etc. eg. eg. To explain the electrophilic substitution pattern observed with any aromatic system we must consider both resonance and inductive effects. If the opposite is observed, the substituent is called a meta directing group. 1: Thus, the methyl group is an ortho, para directing group.
Type 1- All groups having a lone pair at the key atom are ortho, para-directing groups. Substituents already present on a benzene ring also influences the rate of reaction.
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Ortho, para directing groups are electron-donating groups; meta directing groups are electron-withdrawing groups. For example, -X, -O-, -OH, -OR, -OCO-R, -NH2, -NHR, -NHCOR etc. eg. eg. To explain the electrophilic substitution pattern observed with any aromatic system we must consider both resonance and inductive effects. If the opposite is observed, the substituent is called a meta directing group. 1: Thus, the methyl group is an ortho, para directing group.
Type 1- All groups having a lone pair at the key atom are ortho, para-directing groups. Substituents already present on a benzene ring also influences the rate of reaction.
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