new substituted naphthaquinones have been prepared by the oxidation of derivatives of 2:7-dimethoxynaphthalene with chromicacid. From an examination of the experimental results recorded in this paper and of some already available in the literature, it is now concluded that monobromination of 2:7-dihydroxynaphthalene gives the 1-bromo derivative and that dibromination and dichlorination furnish the 1:6-dibromo