Thiele acetylation of all mono-, di-, and tri-bromo-p-benzoquinones, and of iodo- and 2,6-di-iodo-p-benzoquinone is described. Contrary to a previous report, 2,6-dichloro-p-benzoquinone readily undergoes Thiele acetylation. The assignments of orientation of some previously reported dibromotrimethoxy-benzenes have been shown to be erroneous.