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Whatare ortho para directors expalin why OHgroupis an ortho para directorand activator |
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Answer» Solution :Thegroupwhichincreasethe electrondensityat orthoand parapositionare calledasortho -paradirection Example`-OH , - NH_(2)- NHR -OCH_(3)-CH_(3) - C_(2)H_(5)` etc Letus considerthe directioninfluence of phenolicgroup PHENOL istheresonancehybrid ofthe followingstructure  intheseresonancestructuresthe negativeresidue in thepresentat orthoand parawhichis attachedto theisinvolvedin resonanceand it makesthe ringmoreelectronrichmeta positionthereforephenolicgroupactivatesthe benzeneringforelectrophilicattackatorthoand parapositionHenceOHgroupis an orthoparadirectionand ACTIVATOR. |
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