Chemistry Tutors Dwarka - Electrophilic substitution reaction

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Electrophilic substitution reaction

Aryl halide only undergo electrophilic substitution reaction Because due to resonance the electron density on aryl halide is very high.

And it undergo electrophilic substitution reaction at only ortho and para position because due to resonance electron density high only on ortho and para position. Chemistry Tutors Dwarka - Electrophilic substitution reaction

There are some groups which already present on ring increases the electron density on ortho and para position like halogens, hydroxyl, amino, methyl, alkyl, alkoxy etc these groups attract electrophile on ring only at ortho and para position.