the presence of manganese(III) acetate gives naphthalenecarbaldehydes and naphthalenecarboxylic acids. Similar reactions of anthracene, pyrene, and methoxybenzenes also yield formylated and carboxylated products. It was found that the formyl group introduced to the aromatic ring was not derived from carboxymethyl radical generated directly by the thermolysis of manganese(III) acetate, but from a dicarboxymethyl
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