Nitration of dimethylnaphthalenes in acetic anhydride

The nitration of eight dimethylnaphthalenes, and of acenaphthene, in acetic anhydride at 0° has been studied, and the isomer proportions of the products and the rates relative to naphthalene determined. The partial rate factors thence derived are discussed in terms of various steric effects and the applicability of the Additivity Rule is examined. The isolation of several new dimethylnitronaphthalenes is described.