I did an experiment in one of the labs and I have a question I need to figure out. The experiment was the porduction of p-acetylaminotoluene, from p-toluidine. My question is we used acetic acid and acetic anhydride, but which is the acetyalting species. I thought of looking at the structures of them but that kinda just confused me more. I know that acetic anhydride is used to acetylate secondary and primary alcohols sometimes, but it gives a lower yield. I got quite a high yield so I thought that the acetic acid might have been the acetylating species. If anyone could just point me in the right direction that would be gr8. I am goin to ask my demonstrator today but any help would still be much appreciated.