In nitration of acetophenone, an Electrophilic Aromatic Substitution reaction, shown below, m-nitroacetophenone appears to be the major product. (4 pts) a. As we discussed in lectures, this reaction goes through an important intermediate known as a sigma-complex. Please draw the required sigma-complex (intermediate) below the reaction equation. 5. + HNO3 HSO4 NO al) The ortho-sigma-complex looks like this: a2) The meta-sigma-complex looks like this: a3) The para-sigma-complex looks like this: + HO b. Which one in a above is the most stable intermediate? a3?) (al, a2 or (210