NH2 is electron acceptor or electron donor?

  1. i have attached 2 photos here...

    the book said the NH2 exhibit negative inductive effect (negative inductive effect means electron acceptor) , and is ring activating group, but ring activating group is electron donor. which is correct?

    So NH2 is electron donor or electron acceptor?
     

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  2. jcsd
  3. They were supposed to imply "generally".
     
  4. can you explain more detailed?
     
  5. DrClaude

    DrClaude 2,327
    Science Advisor
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    Both! While NH2 is a negative inductor, there is a resonance structure between NH2 and benzene that makes it a ring activator (the resonance dominates over the electronegativity).

    You can find a nice picture of the resonance here: http://www.chm.wright.edu/feld/chm212/eas.pdf
     
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