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    how do EDG(Electron donating group) and EWG(Electron withdrawing group) affect the position a group is added on on a benzene ring?

    Do you talk about mesomeric effects +M/-M and inductive effects +I/-I

    So, EDG that are activating direct electrophiles to the 2 and 4 positions (4 being more stable one)

    Also, why are the halogen groups EDG, but they are deactivators? What does that mean?

    and EWG are deactivating which direct electrophiles to the 3 position.
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    (Original post by PencilPot!)
    how do EDG(Electron donating group) and EWG(Electron withdrawing group) affect the position a group is added on on a benzene ring?

    Do you talk about mesomeric effects +M/-M and inductive effects +I/-I

    So, EDG that are activating direct electrophiles to the 2 and 4 positions (4 being more stable one)

    Also, why are the halogen groups EDG, but they are deactivators? What does that mean?

    and EWG are deactivating which direct electrophiles to the 3 position.
    I've just posted this link... but here you go again:

    http://www.ibchem.com/drop/htm/org/meso_effect.htm
 
 
 
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