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In which of the following compounds, does the substituent not exert its resonance effect?A. `C_(6)H_(5)overset(+)(N)H_(3)`B. `C_(6)H_(5)Cl`C. `C_(6)H_(5)OH`D. `C_(6)H_(5)NH_(2)` |
Answer» Correct Answer - A `overset(+)NH_(3)` group exert only `-I` effect on account of higher electronegativity of `N` atom than the `C` atom of benzene ring and due to ists `+ve` charge. It is not able to exert `+R` effect as there is no long pair of electrons. It fails to exert `-R` effect beacuse `N` is not `pi` bonded to more electronegative atom. |
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