the lone pair on the N forms the N to C double bond then the pi pair in the C to O double bond moves onto the O then the O minus acts as a nucleophile displacing the Br
the lone pair on the N forms the N to C double bond then the pi pair in the C to O double bond moves onto the O then the O minus acts as a nucleophile displacing the Br
Thanks for the reply!!
Ahh! Thank you, this makes so much more sense now!