NH2 is electron acceptor or electron donor?

[kelvin macks]

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?

 

[Lok]

They were supposed to imply "generally".

 

[kelvin macks]

They were supposed to imply "generally".

can you explain more detailed?

 

[DrClaude]

So NH2 is electron donor or electron acceptor?

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